People's expectations for LMA are too high because of the way he came into the team (as a "prized" free agent) and his lofty contract. They see him as a "max player", thus he should be putting up "max player" numbers. Since he isn't marking down 25 and 10 every night, it's like they just dismiss everything else he provides for the team, which is ample offense and solid defense.
Yes, Aldridge's game can be frustrating at times...but it's the player he has always been ever since he played for Texas. He's never been the type to go bully in the paint. He's always favored that mid-range jumper. He'll show flashes in the post from time to time, but it's never been his strong suit and never will be. The difference between now and his Portland days is that he's getting much less shots and isn't quite as effective from mid-range as he used to be. But people who think he is all of a sudden going to transform into a post player are going to continue to be disappointed, despite who is guarding him.
Now if he could just get his jumper back on line, he'd be an even greater asset to the team...because he's going to continue to shoot them.