I agree that Arsenal have many problems but a big part of their problem this season has been their recruiting. They have down an awful job at buying players and this is a big fault of Arteta.
I know people will ask me what I mean because they bought Calafiori and Merino. Yeah, they bought these players, but that's exactly the issue. Those are not the kind of players they should buy.
Arsenal already had CBs like Saliba, Ben White, and Gabriel, I don't think another centre-back was necessary, but they still bought Calafiori. Don't get me wrong, Calafiori is a very good player, I love him but the question is "Was he what Arsenal needed at the moment?". you can't just buy a player simply because the player is good.
Now you have Arsenal lining up with 4 CBs in a match; Gabriel, Ben White, Saliba and Calafiori. They line up like this and want to play modern-day football. It won't work. They will be good defensively, but the dynamism that both FBs add to the game won't be there.
Then when you move on to the midfield you'll see Rice, Partey and Merino in midfield. Why? Why buy Merino in the first place? Again, like Calafiori, he's a good player, but he is not what the team needs. they already have Rice, Jorgihno and Partey who play that position, so why add Merino? What happen to another player than can play Odegaard's position? Now Odergaard is injured and the whole creativity in midfield has vanished. Arsenal now start games with Rice, Partey and Merino who are all DMs or double pivot DMs.
That's very wrong business in my opinion. Martinelli and Trossand are not consistent enough but they turn up from time to time so that position can be left. It was obvious Arsenal needed a key man up front that could guarantee 30+ goals a season, but they didn't do anything about it.
Most of their creativity comes from Saka and Odegaard and we know that both these players don't have any replacements in the team, but they didn't do anything about them, instead they were focused on defensive players. Its good to be solid defensively, but its equally as good to be good in the attack.