If they had a typical ending, nobody would be talking about it. It wouldnt be on Forbes, there would be world wide speculation and debate. The ending debacle has caused more speculation and conversation than the game itself.
Maybe im crazy but, to me, IT makes perfect sense, everything else is a plot-hole filled mess. Im just going to sit and wait patiently. Id rather be blissfully ignorant by believing the IT and have some reason to the madness OR be bitter, unsatisfied and accept the terrible nonsensical ending thus leaving the series with a bitter taste in my mouth. But that's just me, we all have different perspectives as well as different subjective opinions on art.