It's interesting how views differ; I have never been able to make decent scientific graphs in Excel while Calc worked fine for me.

Calc has many features focused on correctness and reliability. Excel is a joke on both of those accounts.

Turns out close to 100% of the spreadsheet users out there don't care about that. It's unnerving and absurd, and IMO, what is even the point of all the effort of entering your data and working it if you don't care about the result being correct? But that's how the world is.