If we look at EPL table then it's clear that Liverpool has played exceptionally well throughout this season, they have lost only one game and won 21 games this season. Arsenal was out of EPL title race when they lost there games against WHU, Arsenal likely to finish second on points table third time in a row provided they perform well in upcoming matches else they might go down on points table. It's strange to see that Liverpool who has done so good in EPL was not able to perform well in other competitions.
Liverpool wasn't a team anyone expected to be this good this season. With a new manager coming in, everyone assumed they would have to give a year or two before Arne Slot could make the team better, but he took it over and made it great overnight. Klopp of course left a great team, and Slot didn't had to get many players to make the team better, Salah was the one that provided the most and that helped Arne Slot a lot.
Arsenal is unlucky in this sense, because normally they failed to win the league because of Manchester City twice, now that City is bad, they could have been title winners if Liverpool didn't win this many games. Three times in a row being placed second place is making the fans a little bit angry, so Arsenal has to make some changes for next year.