Disturbing bits and comedy he always mixed. Memoirs Found in a Bathtub is pessimistic, kafkaesque but somehow funny too.
A friend that knew I'm a fan, showed me a few paragraphs from one of those stories you mention, without telling me the origin. I said they were too dark and bitter for my tastes, before realizing I had read that before. I first read the Diaries when I was 12 (and 13 the second book) when I wasn't so judgemental, just took what I was offered.