Review Detail of Ugachaka in Is it Wrong that I Woke Up in Danmachi as the Main Character?

The writing is great but the rest... The mc is a cringy Garry Stu, he can do everything, he is very observant, very nice, very talented, very smart, strong, the author barely bothers to even excuse the power up rainfall (like seriously, getting from a scrawny kid to a buff adult in a day via training and diluted potions?! A magic, two developmental skills and a skill from the moment he got his falna just because?), everyone likes him despite the conversations feeling wooden, it's enough for the mc to say something like "Ur very purty" to a girl and that's it, she is all already a blushing mess sighing how dreamy he is with little to no attention paid to circumstances and backstory and etc. And on the other hand there is a feeling of bloat to most chapters, a lot of the text is spent inside the mc's head with little to nothing happening or conversations where another character gushes how great he is. In short, the glaring issues are that the author should have held back with how super special awesome the mc is and worked on conversations some more, not every conversations has to be a variation of the mc cornily flirting or impressing someone, especially when EVERYONE are so receptive of the corny flirting...