The permanent solution to this problem would be to turn park into the main casual-friendly mode where whites go in and where green windows are bigger so casuals can have fun.
Then get rid of Stage and turn it into a ranked arena with ELO rating points and a full ranked system like every other successful multiplayer game with rewards, leaderboards, titles and an addictive grind. This ranked arena would have no RNG, smaller green windows, and would give competitive players their fix outside of 5v5.
Too bad something like this would probably never happen until 2K25