And yet to this day I suspect that Kant got a lot right, or at least set the terms of debate for hundreds of years. The reason why his writing is so obtuse is because he is grappling with a rigorous approach to concepts that are intuitively simple but entirely unexamined by most people.
For example, I was trying to make my way through just the intro of a Critique of Judgment and I already encountered an idea so blindingly obvious and yet never really examined. Kant set up a dialectic between two ideas that people all believe but never really examine together:
1) Matters of taste are subjective and there is no reason to argue about them. People like what they like and you can't question that.
2) People argue about matters of taste as if their lives depended on.
I wish I had the time and focus to really try to read through this book, but I know I don't. Still, even getting a glimpse at what was going on in that guy's mind is gratifying.