Dynamic que is helping me climb.
Usually not all the time, but I found this to work most of the time which lets me win my games. Paired up in a que with a duo? -> Dodge it. Odds are against you, take the lp loss and wait penalty. Paired up with a trio? -> Look at your team comp and attitude. If they're casual, dodge. If you guys have a worse comp, dodge. Paired up with a quartet? -> Play with them, even with a slightly disadvantaged team. Chances are they'll have better co-ordination and should come out top in teamfights.
I haven't been improving in mechanics or knowledge wise, but still climbing steadily thanks to knowing what premade groups to dodge. Riot also made it easier to spot pre-mades with their team tags which is a huge bonus.