I'm not defending him, but some events at the club this summer really ruined his plans. Messi left, club is bankrupt thanks to previous board. While most people here were dreaming of Haaland and other great signings, reality is we can't even get rid of dead legs like Umtiti due to lucrative contracts. We have no transfer budget, so basically Koeman has a harder task than previous season.
I hated the way we played today, but we won. And this is what our season will probably look like as we don't have the quality to dominate possesion anymore. Which leaves more open spaces for players like Depay and others.