He is not the best director but he is not the worst either and he at least does have passion for some of his projects. Quite a few of his films have been fairly decent, at least with audiences if not critics such as Event Horizon, Mortal Kombat, Death Race.
And if I am honest, AVP could have been so much worse, at least there were ome interesting elements there, it certainly is a film that could be done better but its not the worst film I have seen nor the worst in the franchise.
Also checking wikipedia myself, there is this little tidbit "Anderson has repeatedly stated he considers himself a "populist filmmaker", who only cares about whether his movies entertain the audience and make it cheer in the cinema, rather than their reception by professional critics."