What do you defines as competence and experience?
Listen even if you like many others don't think I know anything about football, because this is something I have been watching closely.
The football Arsenal are playing is based on strict positioning in Artetas offensive 235 with no room for fluidity or positional interchanges. Anyone who understood the most basic principle in offensive football coaching an let the players be loose up top instead of having to stick to strict positioning without freedom to move in possession would have so much better results. Not being restrictive, and relying on natural dynamics and freedom would make us so, so much better.
"Just go out and express yourself" is actually a good philosophy to have offensively. Not being restrictive, finding the balance and just relying on natural dynamics is often more effective than playing a "system", when you have the ball.
Pressing is another huge issue. We are a possession based team that don't counterpress when we lose the ball, so we can't sustain pressure on the opponent. A big part of breaking teams down is sustained pressure. Arsenal don't sustain pressure on the opposition because of their structural issues pressing-wise.
Anyone who understood these extremely basic, easy principles of football would be a huge improvement. There is nothing to suggest Arteta is good, he has made us worse in almost every stat compared to Emery who also was underhelming. This guy has never coached anyone. At some point can we start looking at actual, concrete performances and decisions rather than wishcasting? On what basis can be optimistic about him? It's entirely projection.