Arsenal going into relegation is a no no, no matter how bad it gets for Arsenal, they'll never sit at the very bottom of the league and very much likely not moving to the top 4 spots, even top 6 not certain under this current management.
Yes you are probably right. It would be funny if they were still there at the end of the season. I do not think they are a top 10 team anymore. They have 0 points from 2 games one of them being Chelsea who are probably a top 4 team but the other team was newly promoted Brentford who are probably a relegation battling side. They have a goal difference of -4 at the moment failing to score in any of the games that they have played. I think they will finish just outside top 10 realistically but I am hoping that they are nearer the bottom.