i think the breaking point for me was when i realized that i had to remember literally everything from the silmarillion to even be considered a contender for an academic grant. i liked the silmarillion, but fuck remembering it all.
also being a legit tolkien scholar means reading the lord of the rings and all his other stuff at least once a year, and i can't handle all that tolkien. he's all about world building, to the point where his prose suffers imho. he's really good at aping and enhancing certain aspects of classical mythology, but that's really the one quality string to his bow. other than that, he has a masterful handle on languages and how to incorporate them in meaningful ways, but that's it. it makes for prose that's at the same time enchanting but also boring, much like someone's really elegant reconstruction of a pre-christian celtic village. in fact that's exactly what tolkien's prose is, recapturing a lost past and presenting it for a modern audience.