WoT is probably worse.
s1 of WoT is a trainwreck of "where did the money go?" reused sets. incompetent costuming. incompetent lighting, etc.
the main difference is WoT is retelling a specific story. one that it doesn't understand, and seems to actively hate. doesn't understand the world, magic system, etc. its all wrong. The main character, is not the main character... Constantly taking things from Rand, and giving them to random women.
Rings of power got worse over time. Lazier. and it started incorporating more world elements. and making shit up, doing it wrong. mithril, etc. but for the MOST part, since it wasn't based on an actual story, it could be forgiven. its not as damaging. but then as it got to similarils, mithril, gandalf, tom bombadil and breaking the world with its nonsense world building, it got worse. and they are closer to each other in being equally awful.
"some kind of, grand elf!"
RoP can still largely be written off as a bad fanfiction. it doesn't effect Lord of the Rings. the same can't be said for WoT. WoT is the main story being butchered. and its the only mainstream version of it. the only version most people will see. and its actively ruining it.