I am in the EXACT same position as you! My mum gave me her snake to tame him down a bit (he was very flighty and my mum didn't want to hurt him). So after about 3 weeks he was fine and ready to go back to my mum's house. We went on holiday and when I came back he had reverted to his old self x10 the nastiness!
He bit me several times (a proper chomp too) and since then reacts the same way as yours when I try to get him out. It is because I am slightly wary of him now and he can sense that (my fiancee can pick him up no probs). Maybe that's why your snake is reacting like that? I tried the fist trick but he bit my knuckles instead
He is slowly getting 'better' though. I have simply persevered with handling. I take him out (I use the look away trick too!!) and handle him until he calms down then let him back into his viv. I do this every day (apart from after eating) and do it about 2-3 times depending on how calm he is. I also just stick my hand in the viv sometimes and let him smell me and come to me rather than grabbing him every time.
Good luck with him, I know how frustrating it can be!