I didn't hate it, but it's so much less than it could have been, and Kaz himself never "gets better" like Ahsoka did extremely well and Ezra did pretty well.
I can understand why it wasn't very popular, it was definitely less epic in scope than the others. But I felt like it was more consistent, there weren't any episodes I wanted to skip. Also I like Kaz's loveable goof character type more than Ezra's antisocial self. He had reasons to be like that but he made it hard for me to get through rebels.
I think it could've been more if it wasn't restricted by the 2 season max rule the Disney Channel was operating with for some reason for all its shows.