The shareholders appointed the board to act as their fiduciaries in respect to the governance of the company. They voted for them. Among the powers they granted

The shareholders appointed the board to act as their fiduciaries in respect to the governance of the company. They voted for them. Among the powers they granted them is the power to accept an offer to buy the company. If you bought shares after the last annual shareholders' meeting, well... presumably you were happy enough with the current board members and the company bylaws to buy the shares in the first place. You did... do some diligence before you invested, right?