Jury Duty, even the waiting around, is necessary and useful. Even if you just sit around, the fact that the court can assemble a jury on short notice helps move the justice system along. Many defendants (or their lawyers) will seek to plea bargain rather than face a trial by jury.
So, by waiting around you are serving a purpose.
In Massachusetts, the county courts have a one-day / one-trial system. Most jury duty obligations are for one day, and you frequently get released early, after all the days trials have settled.
After that, you are prohibited from being called again for three years. I have at least seven more months where I don’t have to worry about being called.
I get called every 5-10 years, but never complain about it. I’m glad to have the option of trial by a jury of my peers, and it’s really a small price to pay.