But I find that she was definitely the biggest. Take the shadow dragon saga for example. I would have enjoyed that saga if Pan wasn't in it. But she was so God damn annoying.

I barely watched any of the Shadow Dragon Saga, so I can't point out flaws there. Regarding the Baby saga, I absolutely despised Baby as a villain. Even in concept, I despised him.

What I also hated about GT is they just outright killed of Piccolo at the beginning. And also made it clear Vegeta also continued to train along with Goku, and yet he hardly became useful untill the very end for Gogeta SSJ4. Also a massive mistake with Vegeta going with SSJ4. He was blasted with the blutz wave to help him transform, but sayain's actually transform through their body absorbing the blutz from the full moon and then their tail uses that to produce a chemical reaction which turns them into an ape. So Vegeta should never have been able to go SSJ4.

Also, Gohan's powers were totally undermined. The reason I despise Baby, by the way, is because I cannot stand mind-control, or anything like it. It takes good characters and, without any remote transition, immediately turns them bad. And of all the God damn people you practically axed in that saga, why freaking Vegeta? He's too much of a badass for that shit. I would have been cool with it if Baby had enslaved the human race, but wasn't able to do the same with the remaining Z Fighters.