If you have 340k and have put huge efforts into online dating and failed, it would be trivial economically for you to hire a professional photographer to get you a better dating profile (most people have shit photos, and you likely do too), it would be trivial to book some sessions with a dating coach (mainstream, not red pill style / PUA stuff) to give you feedback on your profile or real world interactions. You could also afford a personal stylist to do a wardrobe revamp.

Put those monetary resources your brain has afforded you to work.

If you were able to get laid at bars in the past, you are good looking enough. Your profile is just likely bad / has poor photos. And I know that sucks but its the real world.