That's actually a pretty fair take on the show, I really don't disagree. Though in the end, whether directly based on Chinaski or plagiarized from Bukowski, we at least both agree they are similar characters.
If californication was a direct copy of Chinaski, the first 6 seasons would outrageously depressing, with Chinsaki finally "triumphing" in the final season. The final season would also be depressing, but it would be because Hank got everything he really wanted but couldn't stop being a drunk, cynical, son of a bitch.
That said (spoilers), the episode where Hanks father dies and Hank reads the letter where Father Moody says that he's proud of him and the only reason he never talked to his son about his books was he didn't think he was smart enough to talk about them without sounding like an idiot is one of the few episodes of television that made me get a little misty eyed.