It seems like your partner has finally realized that he needs to drastically change his behaviour and have strong self-control to avoid any more situations arising that lead to busybody neighbours or worried passersby calling the police yet again.
Both strong self-control and changing behaviour in a more calm & mature way are necessary
In order to have any chance of ending the vicious cycle of aggression, drunken fighting, forcing involvement in your healthcare and other areas of your private life that you have the right to make your own choice about.
Your partner may be waiting for you to figure out that you also need to change your behaviour and do your part to end the bad habits that have had a very negative effect on the relationship & both of your mindsets.
The ball is now in your court.
It's time for you to make the commitment to building the happy future life that you want and put lots of effort into achieving it.
Whether that involves taking prescribed medications, eating more healthily, doing more exercise, enrolling on some part time courses or finding a mentor.
I'm not sure about your relatives or how compatible they view you & your lifestyle with their family dynamic.
Could be that they are struggling with their own serious health or have financial problems that they need to focus on to avoid ending up jobless, homeless and with no alternatives to relying on food banks.
Alternatively they might be bitter, envious, embarassed, spiteful, religious with little tolerance for those that don't share their beliefs or just plain nasty people that will never do anything helpful if they have any choice.
Do bear in mind that the financial situation in so much of the uk is much worse now than it was before the 2020 lockdown.
Most people now have to focus on their own problems and meeting their basic survival needs.
A lot of people who have very pressurising careers, are low paid or part time workers on zero hours contracts having a very difficult time staying in employment and remaining able to comfortably cope with their accomodation costs.
With many having serious problems even finding landlords that are willing to consider renting to them.
People with housing who fall behind with their rental payments or mortgages and don't have any way of paying their debts within 3-5 weeks are almost certain to end up with ruined credit histories.
Very likely to lose their accomodation too.
There's no time for them to continue with years of fighting.
For plenty of working people having an active social life has to take a backseat until their situation significantly improves.
This can lead to them experiencing a lot of envy and hostility directed at people who don't have to work because they are financially supported by a wealthy partner.