I think I can understand your current difficulties. I have passed through a similar period during which my meditation was pretty much like what you describe. It has been lasting so far for two years, with a constant reducing of the perturbation. In my case, it is due to having taken a too high dose of an hallucinogenic drug about 4 years ago.
From all that I have learnt from this experience, I would say: don't give up. Try not to think about the difficulty of your practice, either during or outside of your meditation time (which means also not talking too much about it just like we are doing now). Because it would drive you off track thinking 'this is too much'. Just sit and accept the reality that has arisen. It is difficult, it is difficult, you know it, but the only right thing you can do is focusing as best as possible on your object. Abandoning the training is not a viable option.
This difficult period has arisen, it will pass away, sooner or later, this is the law of nature. You don't need to wish anything about it, it will happen in due time. Just perform your task, and leave the result to the law of nature. Practicing Dhammma can require performing heroic deeds.
As Goenkaji chants during his ten-day course:
Good to have mastery of speech,
Good to have physical mastery,
But one who is master of his mind
Is a warrior of real courage.
I wish you all the best of strong resolve and energy to get through this.