Too many meetings, and our boss is one yapper

I thought I was the only one frustrated with meetings until my colleagues also mentioned they were not able to get work done because most of the day was spent on meetings

Plus our boss (CEO) loves talking, anyway the meetings are agenda-less. He stretches 30 min calls to 2 hours and then has the audacity to question the productivity.

Cannot tell me this, he gets very touchy when feedback is negative for him. And then writes sarcastic messages. Also, who wants to take up fights with person who pays your salary

What to do in this case? I'm tired of working 12 hours each day