@LTB2025
The best thing you can do is spend as little time in his company as you possibly can. If you can do an outside hobby or join a club (or even fake one and sit in the park), do so.
But also find reasons to be 'elsewhere' in the house; cleaning out closets, gardening, organizing the loft, walking the dog, paint the loo. Just anything that isn't where he is and that he wouldn't want to 'help' you do. Start 'small' and build up to longer lengths of time. Use 'exercising' as a reason for your new 'energy' if you haven't been one to putter about or clean.
Here is one thing though, based on what you said it appears that he's the type who enjoys tearing you down. In that case it may be harder to avoid him, he'll want to follow you round and criticize. If that's so, you'll need to work on 'emotionally divorcing' him. This is where you mentally remind yourself that his opinion means nothing, his words are meaningless, that you couldn't care less what he thinks, says, or does. Keep repeating it until it becomes your truth. Remember that the opposite of love isn't hate, it's indifference. Channel that hatred into working on getting to a state of indifference. He's not worth the 'emotional coin' you're spending on hating him right now. Spend it on yourself instead building up your sense of self and belief in the good life you so deserve.
It's not easy to get to that place of indifference, but it can be done. Just keep reminding yourself that at some point you'll be out of there and into your own sweet quiet place. Visualize it. Visualize slamming the door in his nasty face, putting the phone down on him, telling him you don't give a fuck about <insert his gripe>.
As far as a 'fuck you fund', it's best if it can be kept in cash and out of the house otherwise you may have to declare it in a divorce. Do you have a trusted friend who can be your 'banker'? Also, reexamine that financial 'goal'. If you're saving for, oh say, a 3 bed detached house, would it be worth it to you to lower your expectations to a 2 bed flat if it means getting out earlier?
Also, if you haven't, you need to see a solicitor. I know you think it will be a couple of years, but educating yourself now about what divorce may mean to you can save you from 'nasty surprises' when time comes to leave. Some firms give free 30 minutes consult. But even if you have to pay, it may be the best money you've ever spent. Knowledge is power. Forewarned is forearmed.
Good luck.