I get it you like Radiohead, I just can't get into them at all. It's nothing to do with the music being "too intellectual". In fact the music is far from being intellectual, perhaps you mean the lyrics, but the music is one paced, predictable, dull. whiny, boring and depressing. If you want intellectual music try some classic / early prog with its complex chord structures and time signatures & changes played by highly skilled multi instrumental musicians. Radiohead music is about as intellectual as Coldplay and just as entertaining.
I accept that is your opinion, and good luck to you, but to claim it isn't intellectual is ridiculous. You cite 'complex chord structures' (I think you may mean progressions?), time signatures and changes and highly skilled musicians as some measure of intellectual musicians. So lets look at that:
radiohead chord progressions and key signatures are anything but like coldplay and are some of the most complex of any popular artist going. They regularly use what people would refer to as Jazz chords, and complex and challenging progressions (examples including the overplayed but brilliant Paranoid Android and Pyramid Song) they regularly use modes that would frighten Chris Martin all the way back to a lunch meeting with Rhianna such as Mixolydian and Phrygian.
Time Signatures, again Pyramid song is a great example of changing time signatures in radiohead songs, but Videotape is probabl;y the best example of how radiohead mess with time signatures, a song that 95% of people don't understand how to count to because it's a very fast song disguised as a very slow one. It's very, very clever.
As for multi-instrumentalists...well lets just look at one member of radiohead for starters, Johnny Greenwood, known as a guitarist, but also an excellent keyboard player, master of the Ondes Martenot, some of the best live use of a Kaoss Pad, multiple synthesizers and electronic instruments and tools, wrote his own sampling and sequencing software, plays the glockenspiel, several wind instruments and the viola...oh and he has scored multiple orchestral pieces. Every member of the band is a multi-instrumentalist and have released solo albums other than Colin Greenwood who only plays bass.
The music couldn't seriously be described as one paced either, some songs change pace mid song, others have hidden tempos, some are slow some are fast (not thrash metal fast, but faster than your average non-ballad pop song).
I respect your right find them dull, whiny or boring. But your other comments are factually incorrect to the point of ludicrous. Comparing with Coldplay shows a real lack of knowledge of radioheads work, they're chalk and cheese.