To be honest I was a bit reluctant about reading this at first based from what I've saw (spoilers and reviews). But after giving it a shot, it was actually pretty well made and a decent read. Yes, the story is a bit depressing but in a way it's actually pretty hilarious.
While reading this, always keep an open mind and enjoy it rather than getting depress over something pointless. Yes, the main character always does something stupid and that's why it's actually funny, stop putting yourself on his shoes and just enjoy the ride and you'd probably find this as a well written work.
few chapters is indeed a challenge to read considering the plot holes and idiotic decisions he will make. But try to get over it and you will more or less like the series.