Big games like this are worth 6 points. At the moment Arsenal should feel like they have scored 6 important points because Manchester United were a natural title contender. With these defeats, it would not be right to say for sure, since the league has just started, even if they break away from the competition in the league. Another Manchester team, City 4/4, are at the top of the leaderboard. Ten Hag must now work harder to reduce the points lost in big matches.
Of course there are still the next 34 matches where Ten Hag can improve the quality of his team's performance, but every point lost has made them even further away from the top of the standings.
Ten Hag certainly took Manchester United to a better level of play last season, but this season he hasn't been as good. There needs to be improvement in every game in the future because of course that will allow them to maintain the difference in points with other competitors.