Did you follow the guides in the forum about taming budgies?
If you did and they didn't work, even if you have been very patient and slow, sometimes there is nothing you can do, there are budgies who don't like the company of humans.
I had a similar situation with Sid, my first budgie (the gray male in my signature).
It took 8 months to make him jump on my hand to eat seeds, and only because I had removed the seeds from the cage for a bit (which is something that should not be done, but I didn't know it), otherwise he wouldn't have been so "brave".
Then I bought a chick, Sole, and handraised him, and Sid started to trust me because he saw that Sole was not afraid of me at all. After some time, Sid followed Sole out of the cage, explored the room where I kept them (even going relatively far from the cage) with him, and jumped on me with basically no hesitation if the other had done that. As the time went on, he didn't necessarily need to have Sole near him to stay on me.
Unfortunately, after Sole died (a year ago) and I bought Stella (the hen in the picture with him), who is terrified of humans, Sid became "wild" once again and now he only jumps on my hand if I have seeds for him, and bites me if I don't.
Perhaps this is what you need to do. If keeping more than a budgie is not a problem for you (but you need to reflect on that), why don't you buy a handraised and/or very young male (to avoid mating problems) budgie?
Also, if your budgie spent a year alone and he is not tamed, it is time he gets a friend.
You can find articles and threads regarding taming and thinking about adopting another budgie in these sub-forums:
I hope this helps.