I guess you're not that well versed in the EU or else you would have heard of Darth Nihilus. Luke himself has destroyed a star destroyer in the EU. That's before we talk about the likes of Abeloth.
Beyond that, I'm not sure what you're trying to argue against here considering I've been very critical of the sequel trilogy and hate what they did to the Skywalkers. My earlier posts were very clear on that.
You're arguing against a point I'm not even making