I don't know how legit the statement in that image looks but if he really said that, then it's not encouraging to his players cause it sounds like a coach that's already given up, all hope is not lost and it's still possible for Arsenal to fight to the end and try to win this season's tournament, we've seen Manchester City do it in the past so Arsenal should try to do it also, I know it's not easy cause Liverpool's form is very outstanding but there's still lots of games to be played before May.
Injuries have really ruined Arsenal's chances this season, it started with their key player Saka, then other key players join the list of injured players but it's not over until it's over, the lose against Westham shouldn't make them lose hope already, there's a possibility of Liverpool loosing in matches ahead and they could capitalise om that, therefore giving up at this point is not very encouraging.
Arsenal dropped a lot of points when Saka was in the game, Arteta is not able to maintain the necessary stability, he has slumps every season, and the Premier League is a championship in which opponents do not allow this to happen, because there will always be someone who will have a great season, if it is not City, then Liverpool. Arteta is a good coach, but he clearly lacks something to become a champion.