Thank you. Down in comment I gave offending parts: https://news.ycombinator.com/item?id=14166514 https://news.ycombinator.com/item?id=14166514 and as they say

Thank you. Down in comment I gave offending parts: https://news.ycombinator.com/item?id=14166514 https://news.ycombinator.com/item?id=14166514 and as they say they are not willing to change contract, I have to think twice... as I do not want to retire my skills or cut out my possibility to have a startup one day.