Playing at home against a weak team and Arsenal can win big with a score of 5-0 indeed, it is bad luck for a striker who can't score a goal. Even though Gabriel Jesus was able to make two assists, but that was not enough because of course as a striker Gabriel Jesus should have been able to contribute in making goals for Arsenal's big win.
This is what I have said before, Arsenal striker becomes a striker who is not very productive, it is quite strange to see how Arsenal's performance so far is not because it is supported by a striker who scores a lot of goals, Arteta should consider strengthening his squad, especially in the attack buy a productive striker to be able to contribute a lot of goals.