Is there any good alternative to myAnimeList or would you recommend I go back to the spreadsheet?
Changed the background color not to flash bang anyone
I've been using https://kitsu.app/ for over 11 years.
That said, it's a bit janky. There are some minor bugs that will likely never get fixed because it's on a shoestring budget.
You can always import/export your library as XML though, so you can go back and forth between Kitsu and MAL.