Why isn’t it more like building a hardware store using lumber you purchased from a competing hardware store? Or founding a school using an education you obtained at a different school?
Because that doesn't satisfy the narrative of American exceptionalism. It's easier to point at something and say it was stolen or copied than it is to compete, especially with the political climate in the US.
This isn't an anti-American sentiment. It is an anti-corporate/regulatory capture/embrace and extinguish sentiment (which probably reads the same to many people these days).
Because the companies did it underhandedly without prior consent? Imagine you walked into a hardware store to grab some lumber, didn't pay for it, and the store had to call the cops to swing around your house? That's hardly the typical shopping experience, now is it?
I think that’s my point: none of those things happened, so on what basis can we claim that it’s like they did. Who has to agree with what you’re doing in order for it not to be considered underhanded?