27 june 2021, the the dungeon group finder is still broken.
The game is full of players, but you won't group unless you wait around 2+ hours. Sad... this situation occurred 3 year and half ago: in just one fix they changed the situation from grouping in less than 5 minutes to more than 2 hours.
The community asked them to fix it back. They tried without success. Now, TESO is banning from the forum those who ask them to fix it.
If I think about the situation, I would only rate it 1 star, but the game was awesome and still is if you play solo. Only, if you wanna explore group content, forget it (and also forget about the cie attitude :(( )