this angle suggests that no experience of other person can be useful, since it's a subjective experience. Yes, it's my subjective experience, I didn't say: "do as I did or follow my advice". I said: I wish I knew this from before and didn't make these mistakes. Why do I think these are mistakes? Because I did it one way, then another way and things got a lot better. It made me think that the old way was the problem in cases where I reproduced it multiple times.

However the reader should take everything in my post as my subjective experience which they should make up their own mind upon