I like Promos, I don't like Matchmaking Algorithm
People with more ranked games played probably care more than people with fewer, they've invested more time playing for sure.
Factor that into algorithm. It will make for more interesting games.
I hate losing promos because matchmaking gives me players with 15% win rate and only 30 total ranked games, 10 game losing streak, and they feed 10 kills in 8 mins and don't care, don't listen to advice, and just suicide all game cause they tilt on first blood (which they almost always give to enemy).