"Surely"? What does that mean? Maybe they're just not.
The only really good players we have are Saka and Tierney. Partey and Pepe were supposed to be good but plenty of big money transfer don't come off, maybe they won't make it. Auba used to be good but now he's old. Laca used to be OK but he's clearly dropping off. ESR, Martinelli, Ödegaard might be good one day.
I don't see all the quality in the squad that leaves us "surely" good enough to beat these teams.
Are we playing a prime Barcelona? Or a peak Manchester United?
We’re playing some farmers from Czech Republic and dropping points to dross like Burnley. If you think the players that Arteta has at his disposal aren’t good enough to beat those teams then you’re absolutely tapped.
A good manager can use the players at his disposal and push them to their maximum and that’s the type of manager that we need.