Mixed bag.
My parents have a few spare properties and hosted Ukrainians in two of them. Separate living, not house-sharing. Dad also covered all utilities for them.
One family was brilliant, hardworking, polite, lovely. They found jobs quickly and are still staying in dad's property, paying rent now. No issues with them.
The other one was a single mother with a child. No issues at first, but then the neighbors started phoning my dad and complaining. Constant noise, parties till the early hours, multiple men coming and going, loud music, shouting/shrieking, smoking in the communal areas, the lot. Dad simply phoned the police and kicked her out. Would that be an option for you, OP? Admittedly, my families' situation wasn't happening in the UK, but maybe police would assist you in the UK too?
Ah, forgot to add, she completely trashed the place.
But the cherry on a cake was the third woman. Her daughter was a pupil of my mum's (mum's a secondary teacher). She was welcomed with open arms, mum kitted her out, bought her clothing, fancy backpack, books, games, treats. All other kids were lovely, tried to learn Ukrainian to speak with her, taught her local language, took her everywhere, showed and explained her everything. Also brought treats, homemade cakes, etc. Had a party to welcome her. Took her to the amusement park. All was lovely.
One day the girl just disappeared. School told my mum to phone her mum. Mum did, couldn't reach her. Eventually, after about a week, girl's mum got back to mine to inform her that they left the country, because everything was shit, their welcome was shit, the country is shit and poor (it isn't), not enough financial benefits, yadda yadda. They went to Norway to live with relatives (could have done that in the first place..). Yep, my home country is obv not as rich as Norway, but it's not shit, and we really did try and welcome them as warmly as possible. A kick in the teeth.
Gah, sorry for the essay!