1. Taking everything personally
People are toxic to be around when they believe that everything that happens in life is a direct assault on them or is in some way all about them. The reality is that what people say and do to you is much more about them, than you.
2. Obsessing about negative thoughts
It’s very hard to be around people who can’t or won’t let go of negativity-- when they dwell on and speak incessantly about the terrible things that could happen and have happened, the slights they've suffered, and the unfairness of life.
3. Treating yourself like a victim
Another toxic behavior is non-stop complaining that fuels your sense of victimization. Believing you're a victim, that you have no power to exert and no influence on the direction of your life, is a toxic stance that keeps you stuck and small.
4. Cruelty-- lacking in empathy or putting yourself in others shoes
One of the most toxic and damaging behaviors-- cruelty-- stems from a total lack of empathy, concern or compassion for others. We see it every day online and in the media-- people being devastatingly cruel and destructive to others just because they can. They tear people down online but in a cowardly way, using their anonymity as a weapon. Cruelty, backstabbing, and ripping someone to shreds is toxic, and it hurts you as well as your target.
5. Excessive reactivity
An inability to manage your emotions is toxic to everyone around you. We all know these people-- men and women who explode over the smallest hiccup or problem.
6. Needing constant validation
Finally, people who constantly strive for validation and self-esteem by obsessing about achieving outward measures of success, are exhausting to be around. Those men and women who get caught up in the need to prove their worth over and over, and constantly want to “win” over their colleagues or peers, are toxic and draining.
The entire post can be read here.