Some people really like the idea of the game but not the shitty anti-consumer practices that don't need be in it, so hope it fails so that the next attempt may remove them.
I bought the first on release only to discover that for 6 days of the week there was no reason to play it as you only get loot once per Nightfall, Weekly and Raid, which were the only way to progress character. Plus it was RNG, I still hadn't got where I wanted by time of first expansion due to bad RNG luck.
I managed to near max using first expansion gear but I didn't find the second expansion of interest as no new Raid, so didn't buy it. Suddenly I cannot even do Nightfalls or Weekly, or use new gear which replaced old (replaced, not in addition to...) so what little existing content the game offered was now taken away, leaving my game useless.
So there is my reason for hoping the sequel doesn't do as well. Hopefully game 3 dumps this shit. I ain't even gonna complain about microtransactions.