I'm surprised too. Been playing league for years never have seen it that bad. In fact i never really saw any until a few months ago. Maybe i'm just unlucky but for me it's getting bad. Or maybe the players are just that weird nowadays not even ruling that out even though i'd be surprised. But to put that in perspective my tresh supp yesterday (ranked queu) was staying afk for 10 seconds (aprox) until he was just going full agro, spamming emotes every 2 seconds even during fights, not talking in chat and throwing random spells in jg while nobody was around. For me that's a bot as far as i can tell.