I think I finally realize my problem. I'm just too optimistic
I keep going into each game going "Maybe this ADC wont' suck, maybe this mid lane will roam, maybe this jungler will gank" thinking that maybe just maybe my team won't be a bunch of babbling baboons, maybe I need to stop and just go into a game believing my entire team is shit and be pleasantly surprised the one time they aren't instead of going in believing I won't get morons and once again they are.