the idea of not putting poker on a resume comes up all the time and i think it's completely wrong
you have developed a skill set that is not very common and that is in demand in several fields (has there ever been a dedicated thread about this on 2p2? if not, seems like this could be a good time for it - maybe we could develop a template for poker players wanting to pitch themselves positively on a resume/etc)
of course - how fully you believe that, and the enthusiasm you have when you talk about poker and etc - that will matter a bit
are you applying for jobs that you truly want? do you truly want a job? are you just applying for jobs because that's what your peers are doing and you feel compelled to compete/keep up with them?
how's your physical health - are you in good shape? do you exercise regularly and see a doctor? do you do yoga, meditate, etc? it may be that you're depressed and talking with your doctor and therapist could help you choose from some potential courses of action
you mention you've worked on your mental health some but haven't really clicked with any professional yet - i recommend you keep trying - there are good professionals out there and you're likely to click with one of them - it seems like you have the time and money to keep trying. and when you're with them, maybe your goal shouldn't be to rationalize your poker career but rather to figure out how to become happier in the present - be more at peace with yourself - figure out what you truly want in life both now and in the future - that kinda thing
a lot of people find that volunteering is very fulfilling, or getting into some new hobbies
with time and money you could certainly learn some new skills that interest you, or take more college classes, or take some time off and travel and relax
bricking a dozen interviews can be pretty standard in the business world - there are often lots of people applying for limited jobs, and certain fields can be very competitive. i wouldn't sweat that very much.
with money in the bank, and (hopefully) your health, you shouldn't be under as much pressure as you seem to be. i think a good current plan would be: take a step back, relax a bit, and try and work on yourself as a person and figure out how to be healthier in mind and body - it should help a lot. adulting isn't easy but some approaches are better than others!
posting on here is a good first step and i hope that we can give you some good feedback and get a useful discussion going!