I'm a support main, so I know how you feel. It's really frustrating doing ranked soloqueue! You gotta remain calm though. I find telling my friends about my game afterwards helps a lot. I do listen to music, so I don't normally feel the need to be upset about it in the chat. It's more an annoyance.
From champion select it's an uphill battle. You see people trying to put together the world's worst team comp, and hope that you can make it work even though you know you can't because support scaling is bad.
The next issue is warding. I once told my ADC to please use
because I was all out for 60 seconds, and they threw a fit and said it was my job to ward. We were 5 minutes into the game. Another thing that bugs me is when people expect you to be the only one guarding dragon. I have other priorities, and if I have an extra ward to spare it's going to the dragon, but it's everyone's job to ward that. And also support wards expire just like everybody else!
I can't tell you how many ADCs play like they're melee bruisers, but I generally don't care because the other ADC is usually just as bad and not taking advantage of it (Plus I play Soraka and Janna). I also know the feeling too well when people don't focus the enemy ADC.
I had this one game where this Lucian had out out for this enemy Janna, he didn't focus the Vayne rooted in my silence, exhausted, and at half HP, he went for the Janna. He killed her, but Vayne ended up killing us both. Then this Udyr was like I got this when she was at 6/0/3, and I was like, "No...don't try to duel her please, she's a tank shredder that's fed, wait for me." So we finally trap her out, and the Rammus she's with is fleeing, Udyr flashes past her to try kill the Rammus. I literally almost quit right there because 5 seconds later he was dead and they were running away.
I feel like I get so many of those types of players, and I'm not sure why. I notice that if I stop for a little bit, it doesn't get worse, because after that I had a really bad game.
Another big issue I see is junglers camping top. It seems to be a trend for season 6. I'm an ex top lane main, so nothing annoys me more than this, especially when the bot lane is getting so much pressure. What ends up happening is bot lane eventually caves, because ADCs are so deadly now, then the other lanes get super surprised when they try to duel the slightly fed ADC. The team ends up collapsing. The enemy ADC doesn't even need a lot of kills, just 2 to get going and obliterate the other lanes.
Then the top laner or jungler (that usually I went out of my way to save) says something stupid like, "bot lane fed." And you want to go ham on them in the chat, really badly, but I just gotta remind myself they'll sink soon enough and just reply to that petty jerk with a smiley face.
I'm certain every support main in soloqueue has gone through each of these situations.