The excessive FOMO in Splatoon 3. I know I have already said this in another post, but it's the thing that just bothers me so much. It wouldn't be as bad if they didn't make certain content unobtainable once the season is over, and while the inclusion of gear from the previous catalogs helped a little bit, plus relocating the catalog content to other parts, it's still annoying.
Something more fitted for a mobile game never translates well into a dedicated system game, it's actually the main reason why I'm so glad Splatoon never had a battle royale-sort of mode (although, that could change in the future), but regardless, it's better to let players take breaks from the game when they want to rather than using trashy things like season passes to force them to keep playing. I long for the day in which they stop adding new catalogs altogether.