Why don't solo players realize the benefits of dynamic queue?
First off, the ability to find a good team in a random ranked match and being able to queue with those same players who helped you win for your next match or even the rest of the night would outweigh any and all drawbacks it introduces. The ability to pick your teammates for a random ranked queue beyond a duo would remove all claims of "elo hell" and subjectively bad teammates. People have been complaining about these since season one and now that we finally have a realistic solution, the community has cried out against it.
Secondly, dynamic queue is great for those who don't have the time or the patience to deal with managing or being part of an official ranked team. You can network and build a list of reliable teammates to bring in the matches without having to put in the commitment required by an official team that is actively trying to climb the rankings.
The only drawback I can see is that those who are too anti-social to talk to people, those who draft, play, and leave postmatch without so much as a word, and those who are too toxic to find quality teammates. These are not the kind of people who should be catered to in the more competitive environments of the game.
Not only is the official ranked team ladder being removed because of the outcry this change caused, stripping them of their glory of rising on a ladder intended for those with the best teamwork, but those soloers who wish for only a little more consistency between teammates are going to be forced to play against those able to dedicate their entire gaming time to a single team, all because the loudest mouths are the least willing to communicate with their teammates and form some sort of network on their own.
Are people so concerned about their own personal rating that they would actively avoid playing a match where their opponents are capable of teamwork? Don't they realize that even as a solo player, having coordinated teammates will help them improve?