Am I the only one who despises Kurt Vonnegut?

I have read three different books by Kurt Vonnegut - *Mother Night*, *Cat's Cradle*, and *Slaughterhouse-Five*. Of these, I thought *Mother Night* was average, *Cat's Cradle* was mildly amusing, and *Slaughterhouse-Five* overrated drivel that is shameless in its useful idiocy in the form of moral equivocation. By the end of *Slaughterhouse-Five*, I had read "So it goes" so many times it had lost all meaning.

But the point at which I came to despise, truly despise, Vonnegut came at the very end of *Slaughterhouse-Five*, when David Irving's book on Dresden is quoted uncritically, even though its claims have been proven demonstrably false.

I know Kurt Vonnegut was not a Nazi. I know he was an anarchist. But, reading that, and then learning that he had in fact been called out before he died about how the claims his novel makes about the death troll have been debunked and he is thus simply giving a platform to the lies of a Holocaust denier, and his response had been "Who cares?", tipped me over into thinking that he was a useful idiot for refusing to even consider making a revision to that part of the text, or at least adding a disclaimer at the start.

It is insulting. And his attempts at humor are usually unfunny - they come across as nihilism masquerading as black comedy and failing at it.

The overall impression I got of him was that he was the ultimate r/im14andthisisdeep author.

Am I missing anything? Am I just being uncharitable? Do I somehow not "get" Vonnegut?