I think Arsenal will soon turn things around and win because their dominance is very strong in this match. It's just that their execution was too slow and it's true, Wets Ham was really able to take advantage of opportunities that, even though they were small, could be really effective. Arsenal are already 0-2 behind West Ham and it is now the 82nd minute. So, it will be quite difficult for Arsenal to take over. unless their trainer can make something happen unexpectedly. but this seems quite difficult.
It's safe to say the game is already lost. Only a few minutes left and they're still down by 2 goals. They have a massive advantage in terms of possession, but this means nothing if they can't convert that into opportunities.
They can't be losing home games like this if they want to aim for the championship. Probably will be overtaken by Man City when they beat Sheffield.