Currently finished 22/?. Will avoid spoilers. TL;DR: 7/10 Because I'm weak to harems and big tiddy monster girls.
This is really enjoyable as long as you read it as a comedy about a really stupid, strong dude. The female love-interest is defined early as being "unrealistically perfect," and the male MC is basically raped every chapter. Without a doubt the story as it is would be better without the fiance, especially considering there is zero effort in building up their relationship to the readers. As usual, the MC is incapable of functional human communication with his love interest, and said love interest is just there to cause him constant suffering and strife. There's almost zero plot movement, with the main characters somehow losing what little depth they had as it goes on.
That being said, the writers seem to understand their flaws in characterization it and even play into it regularly for comedic effect. It works in that it makes it very amusing, but there's still very little in the way of investment from the reader. You probably don't need to read it in order even, I'm pretty confident that if chapter 100 came out tomorrow I could read it and know what's happening with very few problems.