I do agree there are a lot of bad practices in SE as well, but let's not blame everything on them.
It's like sales people together with the customer decided the shape and colour of the bridge, as well as the number of pillars it has, and how many lanes it has, and what material it's made of -- here's the stack of things you build with -- and what other fancy features it has, and now finally we can call the engineer so they can hop on a bulldozer and start engineering with their hammer for the next two weeks and show the result so we can adjust the shape if it's not as pretty as we imagined. Actual engineering didn't happen.
Features (or epics or whatever) are larger and contain multiple user stories. In most cases features extend over multiple sprints.