Smurfs hold too much power in MM, now. MMR should be a revealed thing. Not ranks. And on top of that, stricter measures in place against new and unused accts. There needs to be forced measures in place to prevent ruining the integrity of the game.
The problem with them not doing this is because all VALVE cares about are skin sales. The more users (hence the game is free) the more skin sales and unboxings happen. It's the sole reason they don't fix MM.
At no point should a player have to do ALL the work, even in a random game. The higher your rank, the more this should therefore reflect the use of proper utility and strategy. But it all remains the same, if you don't plan to win and contribute as best you can to ensuring that win, don't play. You're the one committing to a "competitive match."
There's casual servers, DM servers, custom servers, mission servers, battle royale, etc.
There's so many casual modes of play that there's absolutely no excuse for a player to queue in "Competitive" and not have a competitive mindset. Period.