Potty training advice?

Iv been trying to potty train my son for half a year now and im getting so frusterated and im not sure what else to do.

We have tried.....

Pullups

Just underwear

Naked

Rewards (stickers, treats and toys)

Potty in the living room, bathroom and bedroom

Taking him to potty several times a day

Making him sit on the potty until he goes

Now we have moved onto a more aggressive approach of letting him wet his pants and bed and getting him to help clean it up so hes more aware

NOTHING IS WORKING AND IM GETTING SO FRUSTRATED