Countering themselves (Rant Of my chest)

Okay im creating this post as a result of frustration recently came back won 25 games lost 5 (three to trolls) then bam out of now where all the trolls got me stole my porridge and kick me square in the balls anyway after three failed promo series im pretty tilted.

Onto the meat nothing and i mean nothing is more triggering than when your team picks horrible champions against the enemy for example last lobby jungle chose Quinn, Top was quinn and jungle was kindred with a bard support, against xerath a functioning tank Jhin.

Either way more often than not my team mates will pick some of the worst comps that i can think of, i try not to be negative as anything can win in low elo but damn its demoralising looking at some dysfunctional comp it not only puts you at a massive disadvantage it reduces the value of a potential comeback.

Just needed a rant as i can only take so many troll games before i just need a good long rant to reduce my tilt levels and writing helps me do this.

My final question is how on earth do you not let bad team comps tilt you in ranked matches.