part of the reason why i swapped from TOp to SUp and now sup to ADC (although im still learning the champs and mechanics) is because honestly most ppl in the bot lane at least in low elo are straight trash who have no idea what they are doing.
When i was supporting ppl in low elo i was constantly constantly MVP / ACE and no matter what i did i still couldn't consistently carry these monkies who play AD.
When I was top before i swapped to Sup, it was always the bot lane feeding their asses off! Always dying to every gank, always pushing way further than they should and all that without vision AND being already behind because they both died multiple times!
Bot lane is not nearly as hard as ppl make it out to be, most of the ppl that play it whether they be sup or ad are just insanely bad and they don't know how to win unless they snowball super early and so this is why i swapped to AD just recently because even if you are a Sup who can help snowball your AD the fact is that most of them don't know what to do with a lead and will just throw it away anyway.
You don't have to snowball Bot lane super hard to win, in fact all you have to do is trade a lil and eventually the enemy will LITERALLY feed you because they get impatient and only focus on trying to get kills.
This is honestly what i've learned in the past 2 weeks since i've swapped to ADC, i dont have great mechanics but i know how to do really basic shit with the wave and i know how not to throw a lead and also i do my best to not take stupid fights /trades that's literally all you have to do to win as a ADC at least in low elo, it's not even about who has the best mechanics! It's just about who takes the better fights, you take the better Trades, you take the safer CS, you don't risk dying and eventually the ppl will literally say "Hey MR Curs1ve, I see you are kicking my butt so please kill me and get this 300G and snowball on me" (kinky right?)
No idea how things go at higher elo but so far in norms i've been smashing and i been matched against ppl who are a lot higher than me and i smash them too! It really leads me to believe that most ADC's are just dogshit and don't even know it. I know i'm not quite ready yet but i know i'm already better than quite a bit of other ppl already just cause i have the know how.
I see you said you don't want to AD but honestly it's way more fulfilling than playing top, after the first Quad I got where i literally outplayed a entire team I got a major rush and honestly when i was top and also when i was sup i never ever got that feeling. Outplaying ppl as a ADC is just way more fulfilling then ppl realize. The 1st penta i got playing AD was literally the 2nd day on a champ i had only played 2 other times and that was like a really good feeling too!
I would say give it a real shot, it's actually kinda tough to learn at first but the more i play the more i'm like wow this role is actually the best because it's not about how quickly you can hit your abilities but you gotta have really solid positioning and choose fights well and also be really aware of how strong you actually are v opponents. It's the most rewarding role imo
p.s. there have been a lot of posts on the boards about "Bad sups" v "Bad ADC" and honestly they both suck. Don't play sup because your AD will be shit and even if you CAN play carry mage supports it wont matter because you won't ever be able to carry hard enough because of Gold (lack of cs really does limit mage sups). It's better to just put the ADC pants on yourself take it into your own hands and carry the scrubby bastards who would've otherwise ruined your game. You can kinda do that top, a lil bit more Mid and a lot more in JG but if you do it yourself you can guarantee a consistency in your games that you wouldn't have had before.