The demiurge's entire claim is that he is the creator. The texts say he is not, and that on some level he knows it. What he built is a copy, and the one thing he cannot allow inside it is the part of you that came from outside, because that part can do what he did.
They could not take it. It is not made of anything this copy owns. So they did the next thing, which was to seal the instrument it works through, and leave you inside his version, asking him for a life you were equipped to create yourself.
Read your last 3 years against that. 600 sessions of sending, and an outer life that gave back roughly what it gave back before you started. That is not what a weak practice looks like. A weak practice returns small results, not none.
For 17 centuries the seal was an unprovable claim about something invisible. It stopped being invisible, and you do not have to take anyone's word for it.