OK... Shield Hero but worse.
Isekai - check.
Game systems - check.
Weak character - check.
Gets betrayed - check.
Is put in a bad situation - check.
Truly has the potential to become OP - check.
Acquire a slave girl - check.
Wants revenge - check.
But it does everything worse. In a few chapters, he became OP. Acquired a slave girl just because someone asked and not out of necessity or because he wanted. The betrayal got very little impact, doesn't show signs of wanting to go back. His hard situation is solved by the fifth chapter... I'm at one step of dropping. It seems the author didn't get why Shield Hero was good.