If he is saying he is very depressed I’d be interested to know what help he has sought to try and get better.
Often one of the biggest problems with depression is actually recognising you are depressed. There is help there though but he has to want to get better.
What is not ok is using it as an excuse to treat those people yoi life badly. Me and my DH have both had depression at times, I can honestly say that we have never “said things we don’t mean just to get a reaction”. He does mean them OP, why else would he say them? And if he is saying these things after a year, when you want a break and he should be showing you his best side, can you imagine how awful the things that he will saw to you will be when after 5 years.
And he has done a budget over the weekend.
He is really not motivated to sort this debt out and he and doesn’t care how upset it’s making you. You first told him you were unhappy last Easter. That is an awful long time for him to have to sit down and try and work this out.
He is giving you crumbs and expecting you to capitulate and he did, well nothing, he is doing absolutely nothing to try and appease you.
And I don’t think the possibility of him having ADHD is an excuse either. By his age he should have figured out he has it, if he has.
Yes people with ADHD can be impulsive but I have it and don’t have debt and I definitely wouldn’t treat my DH how this man is treating you.
There is just so much information out there now on ADHD I refuse to believe that one he hadn’t realised he may have it and two, he hasn’t got a clue how to try and live a more regulated life if he has.
You are not being unreasonable to end a relationship with a man who has debt, who has lied to you, who has been so reluctant to try and sort the debt out when he knows how important that is to you, who won’t respect your wishes to have a break and who says horrible things to you. Any one of those things individually is enough to block and move on.
What would be unreasonable is to listen to him and continue the relationship. If you do choose that though i would recommend asking for information under Clare’s Law as his behaviour is escalating to a worrying level.
I’d also stop answering his messages gor a few days, if you don’t want to block then silence him for a while and have a think about why you think you need more evidence to leave because really you don’t 