What were you at the end of preseason?
Also I'm in bronze 5 because people
Also naw that is never the answer. You should be blaming almost everything on yourself every game. You carry games by not doing stupid shit, you carry 4v5s by doing even less stupid shit. A 4v5 is still winnable until everyone gets level 18 and nearing full build unless the enemy team is really stupid. If you were in a 4v5 and you lost your lane, then you can't blame it on the AFK. If you were a 4v5 and you engaged on a bad fight then you can't blame it on the AFK. Being a 4v5 doesn't mean you instantly lose the game, it means you can't be an idiot running into the middle of the teamfight and just throwing abilities at everything.
My gameplay may not be the best but at least I had a good reason to blame other people for 5 of my games.
ftfy. Staying in the game doesn't mean much. Skill level isn't a scale of how good you are at staying in the game it's a scale of how good your gameplay is. It's about what you do while you're in the game. It's about your attitude in the game, if you're gonna get mad at other people (for DC, AFK, Feeding) you aren't going to play your best.
If you got placed in Bronze 5 you were losing promos to Bronze 4/5 players. If your skill level is that different (because remember they said you would drop a little more than likely) then you should easily get fed in lane and if you're getting fed in lane you should definitely be able to carry a B5 5v5 and you should still be able to pull the weight of 2 people in a 4v5.
One of the things about the soft reset is a lot of people they placed a little bit lower and gave them a higher hidden MMR. So the system probably thinks you're Bronze 4 and put you in Bronze 5 with a Bronze 3 or Bronze 2 MMR. It would mean that when you win games you're getting 20-25lp and when you're losing games you're losing 8lp, making it easier to climb. If you consistently win games your hidden MMR is going to raise while you're rank raises meaning that as you get out of B5/4/3 you have a SIlver MMR and are still getting 20-25lp for a win.
Also you don't really have to rely on 4 players to be better than their opponents. In bronze you can solo carry a lot of games from almost any role. I played over 76% of my games as support last season. It wasn't like I was picking Akali and then facerolling the entire team, I was playing Soraka, Janna, Braum, Leona, Thresh, Lulu. Any support you could name (except blitz) I was playing it. I don't do the DPS as Soraka even when I go full AP on her. Doesn't mean I couldn't carry games as her. If you excel in your role it means the enemy laner isn't doing well which means that you have a strong point in your team they don't. If you win toplane you have an unstoppable tank that the enemy team can't get through but at the same time their tank is underfed so they also have no frontline to protect their backline. If you win midlane you have someone to instagib their ADC (not their midlaner because their midlaner doesn't do damage), if your ADC wins lane you have a higher damage output than the enemy team, if the support wins lane you have more sustain/peel/cc. It's a strategy game based on working with what you have.