The reason people are using these paid queue services is because Node sucks. Isn't it better to use an open source library or adult backend stack which solved this problem 30 years ago?

Trigger is literally open source. That has nothing to do with how mature the node ecosystem is. If you want in-process queue systems you have a lots of other mature options. Trigger is a dedicated queue system, it runs in its own process and can be used from any language through its API. You seem to talk confidently about a topic I don’t think you understand.

Go has lots of mature in-process queue systems, yet River exists, because in lots of situation it makes perfect sense to have your job queue in its own process