Yeah I've been playing on and off since like season 5, I have improved a bit since I started, but this issue still persist.
It doesn't matter the game mode, ranked, pubs, brs, arenas, or the ltms. This game was made around the idea of a team concept and it's literally killing the game for solo players like me, who play with randoms a majority of the time.
Even worse when you do opt in to joining a party with people, they up the difficulty of their already unenjoyable gaming experience by throwing you into lobbies with other pre-made teams which are a majority of the time going to be Plat and up type players, so even if you do get a good squad of people you enjoy playing with, you still don't stand any sort of chance in their sweaty lobbies.
Game needs a serious rework on their Matchmaking, which I hear is coming, but I'm not going to hold my breath.