Why are all Grandmasters in low leagues

I literally saw everyone gm as can be and all of them are in the crystal, elite, one i have seen is only in bronze. Magnus Carlsen is only in the elite league with all those rapid, blitz, and bullet games. If you go to Magnus's Carlsen profile, click on the league and scroll down, there are basically only titled players. I literally only a 400 elo, lost most of my games, and I am still in the elite league.

Yes I know leagues don't matter but if they play so much games, and win them, shouldn't they have a high league.

It's based on the number of games played over the week and most of their games are against other very strong players, so likely last on average longer than those of weaker players at the same time controls. Add to that there is a limit on the number of games you can play against the same player and continue to receive trophies in a day; a lot of top players will play longer matches against the same opponent and stop getting the trophies.

I'm in Champions League, the one below Legend League.

bullet elo doesn't matter