Scott Green:
o·ver·rate [oh-ver-reyt]
verb (used with object), -rat·ed, -rat·ing.
to rate or appraise too highly; overestimate: I think you overrate their political influence.
Whatever the darn word means, an enormous pool of over 33,000 votes were cast for biglobe's Top 50 Grand Prix of the most overrated anime. From Evangelion's presence (despite an evident recency bias), to the fact that Shonen Jump series like Naruto and One Piece are on the list (but low on it), or the presence of series that never all that well-regarded in the first place, there is plenty of food for controversy and discussion on the list below.
70°
400°
190°
230°
Ad 
1050°
But I agree with some of those, even If they're not exactly "overrated". They're plain bad.
Except Madoka deserved to be overrated (which it isn't IMO). That sht was crunk
People have their complaints about it (and I can understand most of them) which may drive them to think that it is overrated but most complaints aren't really that big.