This is an honest take. That internal conflict is something I have thought about a lot since this thread started. You're not a hypocrite.
Hitman lets you do awful things, without question. But I think the difference lies in how those actions are framed and what the game is encouraging you to do and feel.
In Hitman, the violence is absurd and arguably satirical. It's framed as a puzzle with strategies. You're not rewarded for sadism, you're rewarded for stealth, creativity and timing. Drowning a woman in the toilet is a wild gameplay mechanic, not a sexualized power fantasy.
The game in the OP doesn't just include disturbing content, it is centred around abuse, rape, and incest as the reward. There is no satire, no broader narrative, just gratification through domination.
There is a line between narrative violence in service of a story or gameplay mechanic, and content that makes sexual abuse the goal with gratification the reward. I understand that line can be blurry at times, but intent and framing matter. And in this case, they're very different.