U can use history screen and click on specific lines to go back there instead of scrolling, although I should make that small change it's right now in the backlog.
If u want mc to be nicer then don't choose the choices that are making him 'not nice'. If u think a dialogue exist that should be behind a choice because it's too arogant or whatever, feel free to use the bug button and report that line, and I'll check it. Yet if u are expecting mc to be soft silent pussy like every modern gacha game, then find a different game. With love, thanks for playing.