People refuse to accept DQ because in their mindset, the only surefire way to accurately show their, or another person's, skill is to play alone with all random variables. With DQ, now you can blame every single variable on smurfs, or boosted players, or toxic premades, or troll groups.
People also like consistency. At any sign of something they think is unfair, they will get mad, come to the boards, and start making and upvoting threads about the problem they think is at fault. Before DQ, it was all about trolls and feeders. Because the person is playing solo in Solo Queue, obviously they won't blame themselves, so they will look at what else is there. Other Solo Queue players. So they are at fault.
But with DQ, now there is a slew of new inconsistencies that could be why they lost. Must be because they have a 4 man premade and we don't. Must be because I had a toxic premade on my team. Must be because this guy on my team is boosted from DQ. Must be because they had a smurf. Having Dynamic Queue creates these possibilities, but the person complaining about these doesn't even know if those instances were true. The simple fact that they CAN happen means that they MUST HAVE happened. I bet you that at least 50% or more of the example complaints about this on the boards actually didn't happen. There was no smurf. That guy wasn't in a premade with them. But it LOOKS like it, so that guy is going to buy three keyboards for all the keys he's about to break making this boards site a living hell of spam threads about how Riot is corrupt, dead, ignorant, and the blame for all of the problems.
And I'm going to get arguments. I'm going to get people trying to show me loopholes to what I wrote, or that I'm wrong. I might be wrong. But I'm staying by my point, and some of you will read this and agree.