I watched the whole thing over the last couple weeks. It's good, especially looking at it as a children's show. Even though I suspect the target audience was weirdos like me who watch children's shows and not children. Regardless, it did an impressive job of adapting a silly character designed to sell toys to children in the 80s to a more serious story without losing all the charm of the dumb 80s children's fantasy setting.
In particular, it's kind of refreshing to see a very unironic "power of friendship" story. Love and friendship are strong and the characters seriously, genuinely embrace that. And even the big bad evil guys make friends and have understandable motivations even when those motivations lead them to unforgivable actions.
For a significant chunk of the first few seasons it made me think of Avatar: The Last Airbender, but in a negative way. Like they were trying to imitate it in a sense, and not quite nailing it. However, I'd bet that (as someone who hasn't watched any of the popular / "good" kid's shows between Avatar and whatever's popular now) I'm probably missing some context, and that what I see as imitating Avatar is probably more accurately following tropes that Avatar helped to cement. But also, maybe Bow is just a sub-par Sokka. Both are possible
Something that pleasantly surprised me, on the other hand, is how well executed the ending was. Avatar was fantastic all the way through, and then really fumbled the end. And it wasn't a terrible ending, but it was confused and muddled and just not executed very well. The second half of She-Ra's final season was flawlessly executed imo. It delivered on everything it had been setting up in such a satisfying and sincere way.
In particular, I was so happy to see the relationship between Catra and Adora actually ... follow through. Throughout the entire show that shit has been building up, and I was really concerned they weren't going to be particularly explicit about it. Of course, there's plenty of gay shit going on in the show throughout, from Bow's dads to Netassa and Spinnerella to subtler stuff like Scorpia maybe crushing on Catra (am I reading too much into that dynamic? possibly) but even these didn't convince me. Because the theme I noticed is that they never wrote romance. All the couples were already couples before the events of episode 1. They don't usually say anything particularly romantic to each other, with the exception of Sea Hawk which is played so silly that for most of the show it's not even clear whether there is any mutual affection at all.
But then they were just like "lol you thought we were chicken? actually the gay kiss is the most powerful magic you've seen in the entire show."
the kind of ending which elevates an otherwise only pretty-good show to ... idk. really good.
its good folks.
I always got the impression that Adora cared, and was severely bothered by the circumstances separating her from Catra (though, admittedly, this didn't start to cause her any tangible problems until the final season) but there was basically nothing she could do about it. Adora wasn't willing to go back to the Evil Empire of Evilness led by Mr. Evil and his evil shadow wizard, and Catra was unwilling to give up the position of power she had worked so hard for and wanted Adora to just come back and take over the world together. They were at an impasse, and each saw the other as being unwilling to compromise. And, like, obviously taking over the world with the Evil Empire of Evilness is the wrong side to be on, so Catra was always the one who would have to give.
I don't think you're giving enough credit to ... some of the writing. Admittedly there are parts that come off like this. When they coincidentally meet in the field because they're both after the same thing, Adora can definitely come off as strangely uninvested. But particularly in the final season, it's clearly foreshadowed that Adora's distance from Catra is not only hurting her, but is tangibly weakening her. I particularly loved the parts where Shadow Weaver offers her take on things. She thinks it is Adora's feelings for Catra making her weak, but the only thing making her weak is that she hasn't addressed and embraced those feelings. She's confused and distracted not because she likes Catra and needs to give up, but because she and Catra are maintaining this cold distance despite what they actually want.
I think that's a valid criticism of some parts of the show, but definitely not of the final stages. There's no 'acquaintance' in the way Adora thinks about, talks about, and treats Catra in the final season.