Arsenal's management has been awful for years. Wenger is a low-risk manager who would rather finish 3rd in the EPL for three straight years than winning it one year. On top of that they have low-IQ players that are injury prone. I like a few of their guys a lot: Welbeck, Walcott, Ozil, and Wilshere all are complete class. Additionally, Sanchez, Giroud, and Ramsey play very well. But the team is not a good fit together, and their manager is mediocre.
Btw, I have a friend who is a huge Serie A fan, and here is what he told me about Conte:
"
I think he's a good manager. Very authoritative, almost drill sergeant type. Very different than hiddink. Favored formation is 3-5-2 although he's used 4-1-4-1 and 4-4-2 before. He loves box to box midfielders.
The formation came back into vogue in the early 2010s with udinese and Napoli, who used it for counter attacking purposes In the 352 the two wide midfielders are really wing backs pushed forward, and they drop back to form a back five without the ball.
Conte started using it bc he thought to match 3 back formations he needed to use 3 at the back as well. Normally 3 cb is unpopular bc there's a mismatch against teams playing a lone striker. There's three cb guarding against just one striker, which seems like a waste. But defensive and counter attacking sides are more focused on clogging up the box, so that numbers game doesn't matter as much. In the epl when it's worked it's been bc English teams aren't used to playing against 3back, so it's a challenge"
So I hope that's helpful to you!