Are team comps TOO important this season?

So ever since season started I've been hearing it's harder to SOLO carry games and I feel it. On my top account i've lost 12% winrate this season on it's main although all my stats have improved champion performance. Better Player = Lower Winrate? When I started to look at the games I was losing I started to notice something. It wasn't someone fed on the other team rofl stomping us. Well, not entirely. Almost every game I lost on that champ was lost because they simply had a team that allowed someone to carry.

Why is this is an issue? Team game? Yes, it works for flex queue and teamplay but increases RNG in soloQ. How? because not only do you have the RNG of the actually players and the 800m variables that affect their play, now you need them to work with you in champ select to build a comp. In a game, where saying something as simple as "Can you pick someone a bit tankier" can tilt your teammate.....Literally. Happens all the time. Literally if I don't play a peel tank, we don't get one. Even though like HALF of the supports are peel tanks.....nah AP Supports op........smh. I have never lost sooooooo many games based on sheer team comp other than this season. Last season if I was 8-0 I WILL carry. Now if I'm 8-0 I have to pray my team picked the right rock paper scissors so we can win the game meaning the outcome of the game is literally out of my hands. Can I do things that improve our odds? yes. Can I decide the outcome? Not anymore.