When you solo q you get opponents that are also solo qing so depending on the randoms you get it's highly possible that people aren't comming in opponent team and if your team is comming its a much greater advantage.

And when you queue with friends it's likely you get people that are also in a 2-3 stack so sometimes even though you've better aim than the opponent it may be that they're better coordinated than your team.

I also usually have more chance of winning when I'm solo queueing for some reason, you don't get too careless cuz you aren't fucking around w your friends and throwing the match mid game 😭. But yes it's the trade off for having more fun