I'm sorry to hear that you're having problems. When I had my semi-feral cat Cirrus, I couldn't even pick him up and I was afraid to because he'd most likely bite me. The few times I had to get him into a carrier were always very stressful for both of us.
I know this sounds harsh but I had to put a carrier in my bathroom and I tried to put it behind or near the toilet. Then I had to chase Cirrus into the bathroom with a broom and then chase him into the carrier with a broom and try to close the carrier as quickly as possible so I wouldn't get bitten. This was the only way that I found that I could do this.

The reason he's no longer with me is because he and Storm would fight a lot and he was also trying to become the alpha cat. Sunny was the only cat that he liked but I knew it was only a matter of time before he wouldn't like him either. He needed to be an only cat.

If there's some kind of food that he loves, then I'd try putting this in the carrier to see if he'll go for it. You might have to do this for a few weeks. Maybe you could just try feeding him in a carrier with the door open so then over time he won't be afraid of it. Good luck.