Like others said, the market is really, really tough right now. Like, REALLY tough. You and I are roughly the same age, and we've never faced this kind of market before. It has always been relatively easy to land a job. That's not the case right now.
I don't know your whole story, but based on what you wrote here, I think you _are_ on the right track. You're just in a shitty situation because of the market.
In other words, it's not you, it's the market.
Keep applying, keep working, keep looking. Eventually, you'll find something.
Best of luck.