Probably a case of not being fully match fit/prepared tactically given (a) most of our squad are only just back from the World Cup/injuries and (b) we've bought a fair few new players in key positions.
Plus the format for qualification is a bit intense so early in the season. Seems to be a new qualification round every couple of days.
Yes, we should still have won but some mitigating factors would have made it a bit more complicated. Need to win the league this season though.