I've been playing this again for the last week or two. Exclusively ARAM. I played a decent amount of unranked 3v3 Twisted Treeline years ago, but mostly just ARAM and URF when it comes around.
Considering how many hundreds of hours I've put into this game over the last 10 years, It's really fucking impressive how horrible I am at it. Like.....absolutely shit-tier supertard status. I'm almost always the worst player on the team, except for the rare occasions I get a top tier poke/harass champ I'm decent at in ARAM (Kog'Maw, Jayce, Veigar) and get lucky with a couple of early kills.
I'm pretty bad at games in general, but this one in particular I've just never gotten decent at. At least I don't get banned anymore after turning off team chat.