Time has a way of mellowing one out.
Maybe its because I've realized that life is too short to be wasting mental energy on things that won't matter 24-hours later.
Maybe it's because I've realized that life is a series of ebb and flow. Sometimes it goes your way, sometimes it doesn't,...sometimes it does.
Or, maybe it's because my 'empathy' tank has gotten bigger over the years. I've realized that people who are constantly pessimistic, cynical or just angry are not mad at me, they're mad at their situation.
I remember Zig Ziglar advising people to "have an attitude of gratitude". I'd like to upgrade that phrase to, "Have an attitude of gratitude and latitude".
Gratitude is self-directed; appreciate what you have.
Latitude is other-directed; learn to cut people some slack,...you never know what they might be struggling with.