I wouldn't be surprised if Arsenal went on a losing streak in their last two games whether they suffered injuries to their key players, Arteta didn't learn from last season's failures that they don't have enough talented players in the second tier to cover key players. With injuries there are no good replacements, that's Arteta's job to be able to rotate each of his players.
This defeat is certainly detrimental to Arsenal's ability to win the title this season, it looks like they will fail again for the umpteenth time and will not be able to catch up, although there is still time but it is clear that Arsenal without some of their key players will not be seen playing well and consistently. lost unnecessary points, I also hope Arsenal can learn a lot from this defeat.
Arsenal played with their best squad in the last two matches and the defeat was unexpected because previously they appeared quite impressive but in the last two matches they lost their sharpness in scoring goals. Of course, this is quite a drastic setback for Arsenal because Arsenal, which was predicted to be the strongest candidate to win the title this season, actually made mistakes like the previous season.
Big teams often lose points when facing mid-table teams and it happens often. For arsenal they still have time to get back to the top but can arteta stop this bad trend or will it continue. This season we have seen the instability of big teams, as experienced by Manchester city and tottenham and now experienced by Arsenal.