This is for you author, since one can have a good discussion with you without getting heated up even if one attacks your book, so i decided to make a more in depth review and while many points still stand I removed the points where I out of my own preferences was a little unfair.
Writing Quality: 3/5
It's MTL, so don't expect anything amazing. Especially in the earlier chapters, there are many issues like wrong pronouns, wrong sentence structures or swapped roles in a sentence and so on. But I have seen a lot worse and it is enjoyable if you like the story itself. I think just by going through the older chapters and looking at the comments where a helpful reader already wrote the correct version and then correct it, would make it a 4/5 for new readers.
Stability of Updates: 4/5
Not much to say. Coming from royalroad 14 chapters a week is inconceivable and impressive. I always imagine that the quality suffers, so I don't like this way very much and would like to see quality over quantity like on royalroad. But I know that people on this site probably see it differently.
Story Development: 3/5
The problem I have with the story is that I like to see the way the MC has to go in order to become strong or even the strongest, but instead it was only said that he had a training arc with the goddesses, but it was skipped and instead he slowly unlocks the abilities he learned from them through the system. So the reader just sees a list of (yet locked/lvl 0) active and passive skills the MC gets at the beginning of the story and that makes them seem less special and deserved (even if they are). Another thing I dislike is that the story skips around too much, so there is not enough time for proper kingdom/world building, character development, forming of relationships and so on. This makes everything seem less deep and lack substance. But I think the plot itself has potential. It just needs refining.
Character Design 3/5
Like I said, everything lacks substance and so do the characters and the relationship they have with the MC. I have only seen the first three wives and I can already tell that they are very cliche and the others sound to be the same. The same goes for the MC, since he is just like MC in most novels. Person with sad past gets reincarnated and becomes powerful, so he can now beat up the bad guys. And this brings up another point of criticism. Sad pasts. It has become the standard in newer novels and I don't like to see it in every book, especially if every important character gets one. MC has one and both wives he met up until now have one as well, so I would prefer if its not the same for the other wives as well. But I like that he can be ruthless if he has a reason.
World Background 3/5
The quality and the amount we get is comparable to other web novels on this site and I feel like, as always, it is lacking and I would love to see more detailed worlds like in normal fantasy books, but that's just my preference and maybe people like to read more simple books on this site.
I think the best thing the author can do for this book and the next is to slow down with releases, instead of two a day, maybe just write one and instead read proof, take your time to write and rewrite until you got some good quality chapters, instead of just throwing out chapters for the sake of it. Maybe check out different translators and grammar checks and go with the best you can find. I think you can do a lot better if you just take your time and you end up with a shorter/slower released but nice quality book. Instead of being a good author, try to be a very good one. I think you can do it.