How not just give up? There is nothing left, no viable career options, hobbies are pointless because there’s just no improvement past certain point anyway, no alleviation to the fucking constant hurt that’s AuDHD. And nobody gets it, nobody.
Any insight, other than “seek help”, would be welcome right about now.
Get a good nights sleep and allow yourself to have downtime.
Remember that with Audhd there are two wolves. The ADHD side wants excitement and to do new things. The autism wants routine, control and low stimulation. You need to appease both.