Have you looked into this website? https://find.asha.org/ed/#sort=relevancy You are able to see how many applicants applied to each program last year. It looks like CSU Sacramento had 28 applicants and they accepted 18.
I know a few people that did a second bachelors in CSD, applied and got accepted. If you took the CSD courses online it will be difficult to get accepted. I’m only quoting from which my undergrad professors had told a few incoming students in CSD.
Hi! Not sure if you mind me asking but for it to be your 4th year applying have you reached out to any program directors and ask them if your application is strong enough and maybe they can help you achieve what your missing in your application?