One of the most obnoxious things I've encountered recently is the amount of people who are constantly criticizing others on a personal level in the name of "constructive criticism" or "personal opinion." First of all, constructive criticism and personal opinion are two very different things. Second, these two are there to make a point! They're not made for you to use as an excuse to relentlessly bash someone in every possible way.
If a person wants to attack the content of what the other person is saying, fine! But there's a way to do this without resorting to personal attacks. It's not an either-or deal. It's not either your way or the highway. Forcing an opinion on someone makes you a bully. If you don't accept to be treated that way, don't treat others that way. Everyone has a different way of talking and expressing their thoughts and ideas.
If you still find yourself complaining about the same person who is annoying you, then leave. Nobody is forcing you to do anything you don't want and hurting them will only make them resent you. Even if that person isn't in front of you, don't ever think it's okay to attack someone on a personal level simply because you don't like their argument.
2. Your opinion is not a fact, so stop treating it like one
No facts found. Just your sense of entitlement.
3. Go focus on your own imperfections instead and leave that person alone
4. Grab some therapy to keep your emotions in check
I'm not being mean. Some people really can't contain themselves.
5. Remove yourself from the situation that is causing you so much distress
This also applies to people you meet on a daily basis. People have feelings and they get hurt by your words.