I haven't been looking for spoilers, but I am getting that the general response to the show is underwhelmed, which I sympathise with.

Elrond continuously arguing against the use of the rings also bothers me a lot.

Yes, they haven't really developed his reasons for this very well. To me, it just felt like an extension of pique with Galadriel and having been played by Sauron, and a lot like they were creating conflict for conflict's sake.

I mainly associate Tom Bombadil with singing, which just goes to show how long it is since I read the LOTR books too.