Every time I check someone's metacritic scores it seems that the best albums are usually in the 70s while a lot of terrible albums have 80+ scores. Why are the critics so innacurate? Are critic scores bought?
Yes. For example, Unapologetic got a 61 on Metacritic (most of the reviewers gave the album a negative score because she collaborated with Chris Brown on Nobody's Business) but the album went on to win the GRAMMY Award for Best Urban Contemporary Album. The GRAMMYS sees past that meaningless mess and awards true talent.
Some examples would be nice. Metacritic compiles the scores from the top critics, if you're unhappy with a score, read the reviews and understand why it's being praised/semi-praised/trashed. If you're still not happy, you can give a user score and voice your opinion there. Like, what's the problem? :\
Critics have different criteria and their opinions can differ a lot. Metacritic is an average of 30 or so opinions (in some cases, like with Demi and Selena, even less). So take them with a grain of salt