Of course not. Firstly, you are talking about Ben 10 show, not the Ben 10 OS series. Best show refers to the show which got a lot of reviews. Disney, Marvel, are more popular than it and get great reviews. So, that might be the best show in your opinion but not in the eyes of 99.5% people living in this world.
Yep this show and it's sequels minus were all I watched growing up I always wished I had Ben's life going on cool adventures and basically having ever cool superpower plus having a awesome grandpa and cousin