I personally LOVE Pokemon Horizons. At first, like many people, I was mad because they were going to replace Ash. I hated the fact that they were going to make a girl named Liko the main character. I watched a bit of it, and I was intrigued, to my own surprise. The characters (Specifically Liko) were much better and way SMARTER, which made my time watching this series much less painful.
The characters were likable and relatable and they weren't like the same each and every time. Jesse and James were just trying to get Pikachu in so consistently, that it just felt artificial. When the Explorers were trying to get the Pendant they tried different strategies and were WAY MORE SMART. I'm not sure why Giovanni didn't replace Jesse and James, but it would be smart if he did.
I also may or may not love Ceruledge (Pokemon) because it's edgy and stuff :)
SPOILER!!!
To prove my point of Liko being smarter, when Amethio asked for the pendant, Liko said "Sure, I'll just get ready!" and went into her room. She knew he was suspicious and shady so she escaped through the window. I think Ash would be like "Uhhh, sure! Here ya go!" and just give Amethio the pendant. Liko doesn't make my brain hurt and my vocal cords die of exhaustion.