Anyone seriously involved in sports goes through slumps from time to time. My impression is that you're usually a good shot, and are competitive in archery at a higher level than I am. There are two approaches I would suggest:
1. Take it easy on yourself. Shoot non-judgementally for a period of time, with a goal of increasing your self-awareness. Simply notice everything you can about what's going on when you shoot, without evaluating whether what you notice is good or bad. As ideas occur to you for changes, go ahead and make the changes and observe what happens, but without passing judgement on what's happening. If, after a while, you feel like discarding a change, then discard it. It should be obvious to you that something (or some things) you are doing is causing problems, and whatever you're doing is outside your current level of awareness. What may not be obvious to you is that you can increase your level of awareness, the same as you can increase your strength, by working on it.
2. Get a coach. No matter what level you have attained, a coach can see things you can't. Jack Nicklaus had a coach he visited every year to work on his swing. I have no idea what level of golf the coach could play, but I'm sure it was far below Jack's. Nevertheless, he could teach things to Jack that Jack couldn't teach himself.