There will always be people who don't like you and who will condemn your actions. You should not be like a weather vane and try to please everyone. You need to formulate its own principles and to follow them. Then in a difficult moment you will be able to say, "I have acted in accordance with its principles, I have not changed yourself"! That is what mentally stable people.
You got a promotion or set a challenge and you are not sure that you can handle it? Look around and think who could do it better? Normally, the analysis helps come to the conclusion that it was better nobody would have coped. Making sure that your business and professional skills are at a decent level, you will feel a surge of strength and energy. And doing self-hypnosis regularly, you will definitely acquire psychological stability.
Even if you internally react violently to criticism, try to Express outwardly unshakable confidence and peace of mind. Over time, your ostentatious psychological stability according to the law of the physiological alignment will be transferred to the internal plan.