I have 6 weeks of teaching placement left and I want to quit

So I am currently doing my 3rd year BA3 teaching placement, I have already graduated as I have completed the academic side of things however I haven't got my degree (in paper) yet as I wanted to attempt to get the QTS along with the primary education degree. I was poorly last year and got really bad covid which has permanently affected my mental and physical abilities so couldn't do it so they have me the opportunity to re do it this year. Ive completed my first two placements, KS1 and KS2 and quite enjoyed it. Im in nursery for this placement and Im finding it really hard not to quit as its making me quite miserable (not to add I had done a nursery placement before this and found it really physically tiring and demanding so I had to leave that one to go into KS2). Im on a support plan, and I feel like i'm just not getting anywhere and me and my mentor don't really have the best relationship. He failed me on 9 different sections in the interim and keeps reiterating that if I want to pass I need to do this, this and this. I feel like I shot myself in the foot as when I first started I kept saying that I just want to pass and they are holding it against me now. Idk, I dread going in everyday and I feel like I don't have a clear idea of what exactly i'm doing. I find nursery really overwhelming with continuous provision, EYFS(even though I really enjoyed learning this framework during college), having to get the children changed along with the multiple resources you need for activities. I constantly think about leaving everyday but I want the QTS more than everything, I do enjoy teaching just not nursery but I don't know if I can continue knowing there is no certainty that im going to pass. its effecting my financially also as its unpaid and im not sure of any other routes, any thoughts?