"Indie" is just not a tag anymore. On Itch it has no information value anyways, but browsing for indie games is just not feasible.
You need to browse for a nieche. There you have less "saturation". Two or three tags should do the trick. That can bring you down to less than 1000 games.
This here currently has 375 games
https://itch.io/games/genre-puzzle/tag-pixel-art/tag-rpgmaker