[2020] What is wrong with Ranked Ubi ???

The clearance level is not factored into matchmaking, so you shouldn't be looking at clearance levels as a way to determine the balance of the match. Given that you are ranked in the average MMR range, it is fairly concentrated with a wider variety of skill vs the tighter feel of game sense in higher elos. This could be why you feel you are being put with a bunch of newer players since it's a fairly average elo range.
As I used to play competitive FPS games, I can understand it can be difficult to solo queue out of lower elo, especially in a team-based game like Siege. It's why most people opt to queue in a group since they know they can communicate well and play together well. There are plenty of places to reach out to find players to queue with.
If you would prefer to play solo, you need to learn how to adapt to other players and sometimes take the initiative as a shot-caller. You should be taking the time to help other players learn vs belittling them, as that doesn't help anyone in that situation. We have passed the idea of having a solo and team queue option to help separate solo players from pre-made stacks, but have no further info on that at the moment. As I mentioned before, Siege is a team-based game, so the idea of forcing teams to break up for team queue options is less than ideal.