I'll just expand because it seems people are not getting the point - Sometimes top sides are not able to beat a side that they should ideally be beating - it may be because our side had an off day or the opponent turned up.
It doesn't mean that the manager is shit or the players are shit. It's just that things didn't go in your favour. As far as "having won things" argument is concerned, it has nothing to do with a result of a game. Should we win the league next year or this year, that won't make the result vs Villa acceptable, just like Pool's result vs Brentford won't be acceptable to their fans irrespective of what Klopp has achieved with them