I totally disagree. I think he's lowkey a really willing defender and intelligent presser. It's easily the most underrated part of his game. Especially at his size - it's hard to lug a body that big around.
Tonight he had 4 tackles/interceptions combined. Joint highest in the entire team alongside Ugarte. It's not a rarity that he has good defensive numbers.
On the eye test he's not only a willing presser but a very smart one. As an example, this goal against Southampton last month:
https://streamff.com/v/397f4171
Amad got the credit but Zirkzee's press is just as good. He triggers the press by pressuring the keeper, but doesn't overcommit. He puts enough pressure on the keeper to worry him but more importantly blocks the easy pass to Stephens. Instantly, as soon as the keeper is baited into the pass to Harwood-Bellis, Zirkzee sprints to close down the next passing lane from Harwood-Bellis to Stephens. It's great awareness - ends up being as good as an assist for me - yet he got no credit for it.
There's a reason Bologna always ranked so high on their team press; and Zirkzee
individually ranked 2nd among all Serie A players for possession won in the Final 3rd.
I never see people talking about how good his out of possession work is. The opposite actually. I've seen him called lazy when it's so far from the case.