Kant's Critique of Pure Reason can't be understood by anyone -- it defies intelligence.
I actually suspect that Kant (who was a nice guy, a good teacher, , and the TOP philosopher in Germany at the time) wrote the Critique as a prank, to satirize the German custom of idolizing anything produced by "The Master" in any given field.
I forgot to mention that Kant was physically impaired; he had a big bulging head, thin legs, a weak chest, and one shoulder was much higher than the other. He had little to do with women but he did once take a carriage ride with a lady, only to order their return upon learning they were seven miles from home -- that was the longest trip in his lifetime.
The man was a good teacher and his students liked him, but his probable psychological state has me thinking that his Critique of Pure Reason, an unintelligible yet highly praised work, is an insidious satire on a system giving extraordinary -- probably undeserved -- credit to those reaching honored positions in academia.