My man/woman - you gotta try buildkite. It’s a bit more extra setup since you have to interface with another company, more API keys, etc. But when you outgrow GH actions, this is the way. Have used buildkite in my last two jobs (big US tech companies) and it has been the only pleasant part of CI.
I've use Jenkins, Travis, Circle, Cirrus, GitHub Actions, and Buildkite. Buildkite is leagues ahead of all of the others. It's the only enjoyable CI system I've used.
