Just because you have a hundred REASONS to be mad at somebody doesn’t mean you have the RIGHT to be mad at them. At least not if you claim to be a Christian — and I am not talking about the “religious” sorts.
If you really own up to Jesus, then you understand by now that you are NOT PERFECT either. You MESS up too. And although God has a million reasons to be mad at you, He still chooses to FORGIVE you — every time.
God is neither angry nor fussed about you. Your crap is all on you, and you can run with it for as long as you like. But if you seek divine assistance, all of heaven is under orders to rush in and help. You know why? Because God likes you.
Now, if God can be that nice to you, then surely it is not unreasonable to expect that you would extend the same courtesy to other too. The greatest test of spiritual maturity is not how many scriptures you know by heart or how well you pray in tongues — it is reflected in HOW YOU TREAT PEOPLE.
Do unto others as you would have it done unto you.