if The walls are as bad as you are saying they are the council will put them right for you, admittedly maybe not as quickly as someone you are willing to pay will do it, but they will eventually get it done, if the walls are solid and not falling off they will usually tell you it’s up to you to get it reskimmed and that would then be at your own cost, which judging from the photos would be somewhere in the region of £500 maybe more maybe a bit less.
After all they have provided you with a home that some people can’t get, there’s plenty in bed and breakfast accommodations or living on the streets that would be more than happy to exchange with you.
Stop moaning and get on with it, or go back and live in your far better Polish wife’s house that your father in law plastered perfectly!