Why is brawl stars' matchmaking so bad?

This isn't another rant about how ranked sucks or how ladder sucks, I'm genuinely curious why is the matchmaking of brawl stars in its current state so bad. Seriously, is it that hard to make a fair lobby? I recently started playing marvel rivals, and in their competitive mode, the mm takes around 10-30 seconds (at least in my current rank) yet the lobbies are always perfectly fair. They are always balanced out. And this isn't the only game with 10x better mm than brawl stars.

How come if they love competitive play and esports so much, the mm in ranked so shit? When you solo queue in L3, you can get two peak L2 players on your team and two current masters players with an L3 on the opponent team. How can this even happen? Do they just don't invest in mm because it doesn't make them money like they do with bugs?

With ladder, they took the easy way out, making it easy for everyone but sometimes you face really good players. That's it. No specifically fair mm. I know it's sliiightly based on some stats, but that's very minimum, because when pushing ladder, 90% of the time, I face players that are worse.

If anyone has knowledge of mm, I would love even just a speculation on why it's so bad, because it's really getting on my nerves.