The MC doesn't seem like the protagonist; he lacks his own goals and came from another world just to help Doflamingo with his objectives. Why all this idolatry for Doflamingo? The guy just came from another world and has this attachment, which is very strange especially when he feels nothing for his father. His father may be foolish and naive, but at least he never tried to intentionally harm them. However, he knows very well what Doflamingo is capable of, so this idolatry doesn't make sense. It's okay to like him, but any sensible person would be suspicious. Doflamingo is a guy who has no problem killing his own brother if necessary.

I don't understand how this fanfic has such a high rating, he copied word for word from another fanfic, worse than that, he even made a Patreon selling advanced chapters while they are available for free on fanfiction. net

The MC decides to make Bulma submissive and compel her to play with some random guys (Clones) on the street.

The Clone can pretend to be the neighbor who discovers some secret about bulma and threatens her to betray the MC or he will expose everything he has discovered.

Mc could change the clones' appearance to vegeta and frezer and pretend he was defeated and then the clones play with Bulma in front of Mc while he cries and begs to stop.

Most of these haters are because NTR is hated on this site ... But as a big fan of NTR know that I fully support you, you are the author and you have the right to do what you want with the story. I'll take the comments to make some suggestions for you, you could spice up his relationship with Bulma by staging some plots

now that you want to follow this path, there are several opportunities for the author. you can change the appearance of your clones and stage a plot where they defeat you and have sex with Bulma in front of you while you cry and beg them to stop.