Yeah people are no longer want to get tricked by Arsenal since they were almost able to become a champion, but slipped at the end of season.

This give a bad impression for many people to think Arsenal isn't a team that will able to win, even though they're become heavy favorite almost in all matches. Anything can happen for the next 8 weeks, this make Premier League is interesting since in other leagues, we already know the champion.
I agree if you say that Arsenal are often unable to maintain their consistency towards the end of the season like last season, and obviously that makes many Arsenal fans disappointed, Arsenal's performance last season was like this season which was indeed very great and consistent until the middle of the season, the previous season Arsenal contained a lot of young players and often lost motivation when they were behind in a match, In addition, we can see their squad is less qualified so that when many of their main players are injured, there are no reserve players who are worthy for played so that Arsenal performance decreases drastically.
But when you say we already know who the champions are this season, of course I don't agree with you, I'm sure you would say Manchester City and Liverpool as title contenders, right?
I think Arsenal this season gives us more confidence to make favorite them in the race for the championship, this season Arsenal have learned a lot from their shortcomings last season and you can see how the Arsenal line is now almost balanced between young and senior players, so that makes them have great motivation to win every game available, I think for now we cannot underestimate Arsenal because after all their squad has improved and so far not a single Arsenal player has been injured and I think they will be ready to face the remaining 8 games of the season.