A draw is not a good result for Arsenal who are looking to stay away from Manchester City in the title race and I agree with you.
A draw is not a result Arsenal wanted before the match and after they had two goals first. It's a disappointed result for Arsenal indeed.
Liverpool should have lost because Arsenal's performance was quite good. Arsenal's two early goals, which were created in the 8th and 28th minutes, increasingly showed that Virgil van Dijk was someone who had to be responsible.
It was clear from Gabriel Jesus heading that van Dijk didn't know his main role as a center back.
Both Arsenal and Liverpool have risk to lose and chance to win in the match as it has many twists for both clubs. It began like a nightmare for Liverpool but it turned to be a nightmare for Arsenal in a second half and only Ramsdale could save Arsenal from a loss in very last minutes.
Not only Van Dijk but other defenders and midfielders of Arsenal are responsible for their poor defense too. They lost ball in very dangerous areas which gave Liverpool players some opportunities to quickly attack Ramsdale with their shots.