Having read all of Heinlein’s YA novels, and Stranger in a Strange Land, as a teenager, I confess I still have a grudging affection for him, but I drifted away from him, or he drifted away from me. His work became increasingly problematic over the years.
While I wasn’t too comfortable with many of his ideas, he still told a good story, and how could a SF fan not read him back in the day? I read most of his work up until The Number of the Beast, but I couldn’t get through that and gave up about a quarter of the way in. (I checked the last quarter to see if it got better. Nope.)
IIRC, NotB was written while Heinlein was recovering from a mini stroke and a blocked carotid artery, as well as other health issues. I don’t think anyone who wasn’t Robert Anson Heinlein could have got such a self-indulgent, incoherent mess published.
I don’t think I’ve read any of his subsequent work.
Exactly the adjective I would have chosen.