He's getting hype because it was a fairly common belief that he would take longer to develop than the other 5-star D-ends we've fielded in recent years, but he's already made an impact through his first 6 games as a true freshman. Harrison has made multiple plays where he's had to win a battle at the LOS, so I'm not sure where you're coming up with the idea that he's just taking advantage of situation's where he's unblocked. There's a reason he's played more snaps this season
What exactly do you want from him? He's a true freshman who's shown incredible potential so far. Comparing him to Young (Junior, and the best player in CFB), and Landers & Hamilton (5th-year seniors who have been contributing since 2016) really isn't fair at this point. I also don't think there's some much difference between him and Smith - the two of them will be up one of the best starting D-end tandums in CFB in 2020.
I think the hype around Harrison is at a perfectly fair level right now; it's not as if everyone is claiming he should be starting. All I see are fans excited about the level of play we're seeing from a true freshman who was deemed as somebody who might not make an impact until his sophomore year. If the worst we can say is that he isn't Chase Young or one of the Bosa's, I think we have it pretty damn good.