> Despite that, jobs still aren't being dispatched

Meaning your alternative provider is also facing massive outages?

I hear many complaints about github these days due to outages. I am genuinely curious if anyone has switched recently to a competitor for this and gets more uptime?

No, the control plane is still done by Github, so even with your own runners, you're sunk.

github action implements other providers by essentially a request to your runner. so if actions go down, the action supervising your different provider would likely not run so you're going to have an outage anyway