SO, lot to say on this, but I’ll try and be brief.
-Filler sucks no matter what anime it’s in. Even if there’s “good filler” there’s never any real story progression and a waste of time. It’s “FILLER” cause it’s filling space to give the author time to crank out a bunch of chapters before they continue the main story again.
->Read the main story in the manga and it’s better.
-The end of the anime. Even though I like the series, the anime ending was bad, boring, and unsatisfying. The series had lost popularity (cough cough *filler*) and was being taken off the air, they just wanted something to try and tie it up in a nice neat bow, regardless of it feeling forced or incomplete.
-> read the manga. Lol. The story doesn’t end where the anime does and the rest of the manga answers a lot of questions and I think it’s actually interesting and brings the show full circle and feels more complete, even if the enemy’s sudden appearance seems kind of forced.
All in all, not the greatest anime of all time, but I have fond childhood memories of it and it could always be worse. If you haven’t seen it before, look up the filler episodes and skip them, when you finish the anime, finish the story with the manga.