What you said is true with Liverpool they came into the match with much determination on winning the match than Arsenal were looking like. Liverpool didn't have many chances but when there was a very open opportunity to get a goal they maximise it. I have skepticism on Arsenal having this season flow in an incredible way for them, it is going to be harder for them than previous season despite their buildup particularly with how many others clubs have made their squad tighter than how they were.
At every season, the chances of every team building up their squad against the next season is always high, so I see that as not a big excuse for Arsenal not to perform well this season. They have come so close to winning the Premier League not once or twice and they always fail to win it. Every season they build up a better squad than the previous season, but they still fail to win anything in the end. They need to apply a lot of professionalism and dedication this season if they really want to even come close to winning the premier league title. They failed to win the match against Liverpool, their top rival of last season but that should not make them feel reluctant of not triumphing this season. They need to put their heads up and fight for that title.