The main reason Riot is pushing dynamic queue is because of the amount of work they put into it. Sure, you get put into premades "equal" to other premades. Not all premades give the same level of commitment however and generally speaking you have a 50/50 shot of getting stuck with the lesser premade in a game.
In solo queue you had individuals. Sure you had the chance of multiple people holding you back but you didn't have a group of four people making poor decisions rather than just one. It's a lot easier to carry a game when you're not stuck with people who refuse to listen to you because you're not part of their group.
The amount of tilt I've had over the past few days with this nonsense. Haven't been able to top lane properly for a few days and it's my main lane.
I'm trying to adjust to the new system, I really am. It's just really overwhelming to be forced into a group of 3-4 people and expecting a good outcome when they chase kills or cheese a comp. In solo queue you usually only had one-two trollish people. The "this role only", honestly, I found that preferable.
I also have something to say about the "friends in ranked" logic. Ranked is not something you want to do with your friends. It's a high intensity situation and it puts strain on relationships. So I'm not saying you shouldn't have fun but if you're just dicking around with your friends in ranked you shouldn't be playing ranked.
Though most of my feelings could be coming from this exceedingly stupid meta. Top that off with death timers.
Way too much changed this season and Riot just kinda shoved it down our throats. They really should have staggered the changes.