The show was supposed to last way longer than it did. Originally it was planned to basically be a monster of the week show, which is why the middle half is so slow and repetitive, but when the show was close to cancelation they massively increased the pacing. The last ten episodes are great and the ending is unique for a show of its era. But your completely right about the quality around that point. The animation gets very lazy and every fight re-uses the same few clips of a Zaku blowing up multiple times a episode.
I dropped Gundam with Zeta. I couldn't stand Kamille as a character, he's a re-tread of Amuro, but way more retarded, where most of the bad things that happened to him were his own fault. I also got really bored with the story. The politics of Gundam are very samey and have that anti-war "let's get along, everyone is equal" boomer liberalism that's painful to look back on in the 21st century.