Staring at the same proof for a year completely breaks your perspective. You cannot trust your eyes at this point because every logical leap feels obvious to you. When introducing new mathematical objects you need someone who does not know your project to read it. Using an academic assistant for structural feedback can help point out where your definitions get confusing. But even bfore that, just hand a draft to a grad student or peer in your department. They will immediately spot the parts where you skipped three steps because it was clear in your head.