This guy truly is a useless scumbag. It's hard to root for him. But then this is a manga where you would expect any real progress until the final volume anyway.
I think some of the best comedy happens when nobody is the "good guy." The closest one is probably Hanano, and even she is chaotic. You don't have to root for anybody, just chuckle at the madness.
Whether you liked the show or not, Seinfeld had a rule that really worked for that kind of humor:
no hugging, no learning (basically, every episode can be its own shit show and there doesn't have to be character progression). This is the kind of series that I think would be
ruined by some tie-it-with-a-bow final volume.