I would suggest you try to go one complete day without complaining, comparing or criticizing others.
Then at the end of the day, examine your conscience and see how you did.
I bet you will feel better than you expected.
BTW, a good boss will get better results with compliments toward an employee that with the three Cs.
Actually, bosses tend to be quite harsh personalities, that are focused on the end result, and not on making their employees happy.
People have studied this, and people get promoted are tougher towards others than those who do not get promoted.
Anyway, I have spent too much time debating this. I will let you go. I need to do other things with my time.