Thousands of UAW members are rejecting the UAW's 'historic' agreements. Why?

So far, five UAW locals have rejected the deals. Did the UAW over promise and under deliver?

Image: UAW members on strike in 2023 via the White House on WikiCommons

The United Auto Workers (UAW), according to most media reports, just won historically good contracts at the Detroit Three automakers. However, if the agreements are as good as the media is selling them, why are thousands of UAW members at General Motors voting against the contract?