I don't think it's that no one cares, it's that he is very difficult to stand up to. The EU needs him because Turkey is the only thing holding back a flood of 2 million refugees. They can't threaten sanctions without risking the floodgates being opened. The US has had a long relationship with Turkey and doesn't want to terminate it unless it has to. Turkey also has the second largest standing army in NATO and is a regional rival of Russia, which is convenient for us.