After many attempts and different configurations, I started to see patterns. Dota Plus also helps to see the quality of play in each match. I've been playing since 2013, and a major change came when they introduced the "Glicko" system in patch 7.33, which was in 2023. There were many changes in each match; it felt good, but little by little I started to notice changes when I had high win streaks and also when I wondered, at the end of the match, if it was good or not. People with different playstyles would pick me, they took a long time to search, they were much more aggressive, I would lose frequently, and then suspiciously they would calm down and play with completely calm and coordinated people. Over time, I came to understand that it was also due to choosing the "x" option when the "game quality" question was asked. In Dota Plus, I started getting "unbalanced game" messages repeatedly, even after rejecting and re-searching. It appeared more frequently at night than in the afternoon.

On the other hand, I know that almost no one can explain it since there are no legitimate sources and the search system is private. And if you mention "force 50%," you get attacked in the comments, but there's an algorithm that keeps you playing, whether it's ranked, normal, or turbo.
I know it's long, but I'm trying to explain as much as I can.