"Descending into lava lamps and nonsense." is hardly what I'd call it. Kubrick is all about subtext.
There'a lot of Kubrick I don't get. I have actually read A Clockwork Orange, the novel, and liked it despite its Burgessian lapsed catholic babble, but I intensely dislike the movie.
And don't get me started on The Shining.
Anyway, I gave up on deeper meaning in Burgess' work a long, long time ago. I still read him with great pleasure, but that's for the linguistic fireworks and his steamrolling, gutpunching flair for telling a story so you hear the sounds and smell the smells.