i think i need to switch boards

My DD is now almost 7 months old. BFing for me has been horrible Ive never been able to wean off nipple shields she refuses to nurse unless the environment is perfect and if she does nurse its for over an hour... and god forbid i move its over. I went back to work at 13 weeks pp i had only pumped a few times prior to that. needless to say BFing got worse a little before 5 months she went on hunger strike after hunger strike she refuses the breast more than shell take it i pump probably 5 times a day and can only get her to nurse right before bed or in the middle of the night ( i think its more comfort than anything) Im so tired of trying to fight with her to eat (sometimes even a bottle is hard to get in her) I feel so guilty about not doing a better job. Im pretty sure now im having a episode of PPD thats been going on for months i feel its mostly brought on by my guilt of this failure. Im now struggling with deciding to wean completely and go to formula or try to EP. Im not sure how to go about either. Ive been mostly pumping for months now but i have little no stash anymore and im pumping to get the next feed every time. DD is kind of "tempermental" if you will and i have yet to find a hands free method that works for my large chest (38 F/G) Im not too sure what im looking for but ive been lurking here for a while and anymore i seem to fit in more here than anywhere else. how do you go from BF to EPing this late in the game i know formula isnt evil but i have such anxiety and guilt over not giving her only BM for a year i feel i may lose my mind either way. thanks for listening and any thoughts would be appreciated more than you know !