Yeah, I've always noticed the very beginning and end of a saga re usually the best parts.
The beginning is the most fresh, usually with a new female character introduced, new rivals, and new Pokemon, so it feels more interesting to watch.
Then the ending is of course the leagues and when Ash's team is the most developed.
I do think the middle of Johto, AG and DP are all where they all dragged. There's of course a lot of great episodes in the middle of the 3 arcs, but that's also where the most filler is too.
The beginning is the most fresh, usually with a new female character introduced, new rivals, and new Pokemon, so it feels more interesting to watch.
Then the ending is of course the leagues and when Ash's team is the most developed.
I do think the middle of Johto, AG and DP are all where they all dragged. There's of course a lot of great episodes in the middle of the 3 arcs, but that's also where the most filler is too.