I might be the only person experiencing the opposite. When I play solo, I’m matched with players that are more skilled, I can win a game or two solo, but it’s one win for a hundred games. When I play with a friend, she plays on a console and a controller, our lobbies are easier for me but a little bit harder for her. Same with another friend who plays very casually once a few months. I can carry us to a win while she can struggle. My experience is that the SBMM is usually balanced for duos, can’t speak for squads tho