That's their goal. No skiil-based or power|class level matchmaking. If you play alone and win several matches in a row - game give you most unskilled players in your team, while enemy team will be a full stack with several flawless clears. Same with me - i win 2-4 games and after that game give me 3 and 4 rank guardians who even don't know the map or how use radar - while my enemyes is all 10 rank with meta builds. No chances. What can i say - several youtubers like Frost and etc. couple of times trying play solo with randoms. If i not mistaken - even they, skilled players, couldn't clear flawless fast becaouse that system. And they was VERY annoying how those random teammates performs. So - if you want clear trials and not have a deal with this rigged matchmaking system - you must find for yourself decent team you will play with.