I can't believe the amount of impatience and negative comments towards Zirkzee after today's game.
"He's a striker, so he should score goals."
"Game's too fast for him."
"I'd rather have Weghorst."
He's barely 2 months into transitioning to play in the fastest, most physical league in the world, within what has been for the past 2 months a largely dysfuncitonal attacking unit, not to mention being 23, so still developing as a player (keeping in mind not every player develops at the same rates/ages).
Give him time. Give him patience. Let him learn and grow and adapt - expecting him to hit the ground running from day one and be banging in goals and linking up with Rashford, Bruno, Garnacho (all 3 of whom have been criticised for the deficiencies in link-up play) is like expecting to move into a brand new house and feel 100% at home with great relationships with your neighbours 2 months after moving into a brand new country.
A small proportion of players can make that transition so quickly. Most take longer.