The Ranked game modes are ungodly unforgiving to players both new and old. The weapons are broken, we’re going up against clearly full teams even on solo/duo and players seemingly knowing where I am at all times. The game is plague with BR balancing issues and cheaters. We don’t need input queues. We need console and PC queues cause this game is far from being balanced and fair for anyone to really accomplish anything in Ranked matches.
As for most your issues I don’t have much to say at the moment, but I don’t think you can play against full teams in Solo/duo. But if you’re against four people with mics used to coordinating with strangers and or people who use the tagging system well it can feel that way. But there is nothing you can do about that. Some people are just good at working together.
I try to, but it seems like all my teammates run away from me like my character has some sort of disease 
I played I think 2 weeks ago. Played BTB. Got steamrolled 11 of 15 matches by what seemed to be big parties. Have only played a little 4 v 4 since. that has not been quite as bad. But the matchmaking was really bad. Will play some after this update to see if it gets any better. I loved the last flight of the beta game seemed balanced, all the weapons were good. Now they have nerfed several weapons and the matchmaking has been horrendous. This game even being free to play will die if they can’t find a way for casuals to have a good experience.
Yeah, that can be the case. I guess I should avoid ranks unless I’m with a friend or have a full team with me to communicate. But the aiming in this game is so random at times. Feels like Aim Assist is active at times but other times it’s completely gone. I’m playing mostly on Xbox cause the PC version isn’t optimized for Radeon graphics cards.