Maybe you need to respect devs providing FOSS a little more?
The combined installer is perfectly economically reasonable. But if the solution to your annoyance would take "5 seconds" to implement as you describe - go submit the damn PR - you've spent many times that in condescending tirades in the comments here.
> devs need to respect me and my PC
Just the opposite - no one has less of a prerogative to support "problem users" than an open source developer. Were I the maintainer, I would not be inclined to support your request for it's own sake unless you were financially supporting the project or others also raised the issue.