Buy a gold item.
BUY A GOLD ITEM!
Don't take cs from your marksman.
DON'T TAKE CS FROM YOUR MARKSMAN!
I swear autofill has ruined this game. So many people get filled to support that either don't want to support or don't know how to support. Taking cs from a marksman because you were too greedy to build a gold item is a sure fire way to put them on tilt and ensure that neither one of you is as strong as you could be.
Mafia LeBlanc1 votesThe OP is exactly WHY that role is so hard to find people who want to do it.
You're essentially completely at the mercy of the ADC, and people with that attitude tend to bully and harass the support all game.
When I get stuck as support, if they talk to me like you're writing this topic, I immediately leave the lane and roam the rest of laning phase, since it's clear you're going to spend more time typing than helping me in a fight, just so you can say "LOOK AT THIS TROLL REPORT PLS" in all chat.
There is more than one way to play the game, especially when the current meta has shifted so much and the early game is so important.
DemainaNyx1 votesYes, I'm completely at the mercy of a ADC by buying a 
and then building full AP on Brand support. So TOTALLY at the mercy of my ADC. </sarcasm>
Yes, if the ADC yells at me "DON'T TAKE CS" after they die or while they are out of lane, then they are an idiot and I'm going to continue to last hit while they aren't there cause at least someone is getting the gold then. But if I'm in lane stealing CS that they can get, I can understand why an ADC would be mad. I'm assuming the OP is talking about the latter.
Yes, there is more than one way to play the game, but the meta is generally the most effective way to play the game. If you have $425 to split across 5 people, the meta says it's better to give $100 to top, mid, adc, and jungle, while the support gets $25. However, a support can buy an item that magically generates gold from no where without the passive going to waste, so now the support has $50 instead.
You are welcome to play this game however you want. Play with two top and no jungler, then you will waste all the gold from jungle and gimp 4 teammates in levels instead of just 2. Play with no smite on the jungler, then he will be behind in levels most of the game and your team will lose that smite steal. Play with no support gold item, then you will be behind in gold for most of the game and taking CS from the people who asked to carry the game. Play with never buying a sightstone, then your team will be at risk of not having vision and walking into an ambush if the team doesn't ward. You can play however you'd like, but it will most likely hurt your team unless you play extremely well.
Support only means you are the gold deprived and level deprived character on the map and you are expected to do more with your knowledge of the game and knowledge of your champion rather than by buying items. You are welcome to buy whatever items you feel like. AD Thresh will certainly do a ton of damage and still maintain a lot of utility. Only Riot can stop you from doing whatever you want, and so long as you are trying to win and people aren't actively reporting you for your playstyle, you should be fine.
RogueWill1 votesIf after the first 3 waves you have less than 10 cs, I'm taking the CS. Is obviously you don't know how to CS and I could do more with the gold than you at that point.
DemainaNyx1 votesThe thing I don't get about people who get autofilled to support is they don't know what to do there. All you do is annoy the enemy laners, that's it. It isn't hard. With maybe the exception of jungle, you do that in every other position, except you have to do it while CSing. As support, you eliminate the CSing part, so your job is even easier. Play to your champions strengths and annoy the enemy laner.
You get supports that pick Zyra and don't use a single ability all lane phase. Or pick Thresh and never throw a hook. Or pick Soraka and not heal allies. You pick specific supports to do certain jobs, and if you don't do that job or at least ATTEMPT to do that job, pick something else. This isn't hard. I don't care if you miss every hook you throw as Thresh, just throw it if you think you have a good chance to get it or at least walk up and zone them by making them fear being hooked. I don't care if your plants never do damage cause they keep targeting minions, it pressures the enemy off the minion wave for 5 seconds and might give me a CS advantage. Soraka is harder to mess up, but so long as you at least attempt to heal me during fights when I'm tanking damage, then you're doing your job. If your ADC can't see that, then they are an idiot and you should probably mute them.
If you are a Riven one trick, play Riven support. She has two forms of CC, multiple dashs, a shield, and tons of damage. Build a relic shield, buy a sightstone, maybe upgrade to Face of the Mountain or the Eye item, and then buy Riven items. Yeah, you won't have the same burst you would at 10 minutes, and you will be under leveled, but you will be playing a champion who's playstyle you understand and who's abilities aren't foreign to you.
I had a game last season where my support didn't know he was support until we were loading into the game, so we had a comp like Jinx ADC, Nasus Support, Jhin Mid, Shaco Jungle, and something top (can't remember). Nasus didn't buy a support item, but he stood in the bush and let me farm while dropping E's on the enemy. Eventually he got greedy around level 4 or 5, ran up for a kill, and died since the enemy jungler came to gank. He swapped with mid Jhin (his duo) at this point, sending him bot lane with me. Since I wasn't going to fight for CS with a Jhin who was a level or two higher than me, I told him to farm and I'd support. I bought a spellthief and used my rockets to annoy the enemy while Jhin farmed. I ended the game with something like 
.
Is this how you should ever build Jinx ADC? Probably not. Would I ever recommend playing support Jinx? No.
What it did do was make the best of a bad situation and play to my champions strengths. AOE crits from rockets plus Runaan's plus BC passive shred means armor shred across the whole team. I cleared wards quickly and helped make up for the drop in DPS when Jhin had to reload. We also had duo execute ults so if he managed to tag someone low with his ult, it made landing mine easier, and if mine didn't kill the person, his sure did after that. We also had duo ADCs to some extent, so if one of us was killed in a fight, the other still output a ton of damage. There was even a point when I was clearing wards and my teammates called me to help with Dragon cause "we need the ADC".
Anyone who "just can't play support" is just honestly not that good at the game since it literally takes all the pressure off you. Unless you are a high priority support like Soraka or maybe Thresh who are great at keeping teammates alive and relatively easy to kill, very rarely are the enemies going to be jumping on you in a teamfight. And if they are, that means that's time your team is doing damage to them and cooldowns they are wasting on a lower priority teammate.
