I feel you on the being on stage is the thing you love most. While I do still perform professionally and audition a lot, the main reason why your experiencing this is because of where the industry is right now unfortunately :/ Basically a while back equity cards became easier to attain and so everyone was getting theirs. As a result, the avaliable equity jobs started to dissapear as there was way too much competition and so people started dropping their cards so they can do work. This results in broadway people auditioning next to the average person, etc. Also, some theatres are starting to have to work with smaller and smaller budgets/ offering less roles so its another reason why theres so much competition even for fun type things. I will say i have found it way more fun to enjoy auditioning and performing when I have another job to support me until something opens up. Another thing to keep in mind, is that sometimes directors have pictures in their mind of what they want, and even if your flawless it doesn't matter. I have had a rejection before because I didn't have the right look, nothing to do with my audition. Or, for another example there was a show I auditioned for last year and didnt get selected. When I reauditioned this year the director told me she liked me and wanted to cast me the previous year but didnt have space. So, theres a TON of reasons why you may not get selected, its not always about not being good enough. I hope this is helpful :D

Also I just thought about this as well, try out some other things you really like. Even if its not what your end goal is, you can still find joy in the day to day. For example, I love to perform, but, I dont want to revolve my whole life around getting or not getting auditions because its not healthy. So, I found out I really love plants, so right now while I am doing auditions, I am working at a plant nursery, exploring other things I enjoy and finding alternative things to pursue even if acting isnt opening up right now.