I know that I take some of the blame for playing solo queue in competitive, but seriously?!
I'm 2000sr. The highest player on our team was about 2200sr. The lowest player (that I could see) was 1100sr.
That's a huge difference (they lower one was in a group). And of course, we lost. The lower player used their ult in spawn and instalocked characters that didn't counter, even with polite recommendations.
I would personally be fine with longer wait times if this didn't happen. I know that SR is an imaginary figure, but it still sucks to lose a game for a reason other than your own lack of skill/teamwork (wasn't 100% his fault. Some guy left halfway through).