Solo queue is only a measurement of individual skill and used to improve your own ability and should be played selfishly as said above because if you seriously want to win you will carry yourself and then as a result your team. You are the only one whose ability you are completely sure of initially, and your team may not be on board with working together as one; because of that it isn't so much about winning every game- though that should also be a goal- but more about getting better as a player on your own.
Ranked teams is where the competitive aspect comes in because ultimately the game is a team game, you have no toxic teammates to worry about (if you do that's your own fault), and you should already (ideally) be playing perfectly as opposed to "okay this game I can't count on my team whatsoever so I'm gonna go for 32432984 farm at 10 minutes and have 0 deaths and if that happens, you know, it's a personal victory"
tl;dr the whole "toxic teammates" thing is irrelevant to the competitive side of LoL and should not be your excuse for not playing or hating the game
and 99 times out of 100 you'll only see them once until you're in Challenger or Diamond # in a division alone with Xpecial
Your tone is ruining your credibility? I'm not very inclined to listen to someone who's talking to me like I'm 12? I don't expect anyone else thinks otherwise?
In any case, anyone can form ideal scenarios to back up their own arguments.
Sure he can be a godlike teamfight initiator so long as he's level 6 but if he doesn't have the build to exist after starting said fight he'll still get dunked, not to mention if somehow your whole team ends up behind your initiation is even more worthless
Sure you can tell your team to ward your red but what if they come for your blue while you're there? or you get caught with half/no health or you see someone in your ward and can't fight them directly, do you intentionally slow down and/or give up the buff? "but my team can come help me!" maybe so but generally when one plans to invade the enemy jungle their team is probably ready to jump on you just the same
they could try to avoid teamfights altogether if you're that far ahead since fighting would be suicide anyway
every game will not go the same way as the last and as such your plan will not always work and your "this champ is freaking OP" mentality will only get you so far- especially if he ends up banned. There's too many variables in the game to reliably assume all of the above is neither true nor false.
EDIT: then again, the entirety of my experience playing with you (that I can remember) was insta-lock first pick jungle nasus so I would hope you know about anti-counterjungling measures.