Speaking of the Kimba/TLK thing, I remember reading a long while back that, according to early concept art, Simba was supposed to be a white lion, and that one of the guys working on the movie thought that they were doing a Kimba remake. Whether or not they were is up for debate and, honestly, it's not all that important to really obsess over if this is the case or not.
What do I think? I do believe it's very possible that TLK was inspired by Kimba. There ae a number of similar scenes that it seems unlikely that they weren't influenced in some way. However, TLK is not a direct copy and has other influences put into it, such as Hamlet, to make it different from Kimba. So I don't see TLK as a 90s Kimba. Just as a 90s animation that drew inspirations from Kimba and other sources, but is still its own thing.
Back on topic with The Lion Guard, while it is not something that I'm personally fond of (for instance, Kion getting that roar 'power'), I don't really hate the show nor do I consider it trash personally. It's just not my taste. I consider it a relatively harmless show, even if I don't like some of the stuff about it.
However, if there is one thing about it that I am impressed by, is that they finally had a friendly hyena character. The beginning of this show seemed to paint them as just "kill them all" type of villains (even worse than how they were treated in the first film). So the fact that they did have an episode where Kion met a friendly hyena was certainly a plus to me.