HOW TO DEAL WITH BITTER CRITICISM

Those who are ignorant have uttered curses at Allah, the Exalted, the Creator of all that exists, so what treatment should we, who are full of faults, expect from people. You will always have to face criticism, which in its onslaught is like an interminable war: it shows no ending.
As long as you shine, give, produce, and have effect upon others, then disapproval and condemnation will be your lot in life. Until you escape from people by finding a tunnel in the ground or a ladder leading to the sky, they will not desist from censuring you, from finding fault in your character.
For that reason, as long as you are from denizens of earth, expect to be hurt, to be insulted, and to be criticized.
And here is something you should contemplate:
A person sitting on the ground does not fall, and people do not kick a dead dog. Therefore their anger toward you can be attributed to you surpassing them in righteousness, knowledge, manners, or wealth. In their eyes you are a transgressor whose wrongs cannot be atoned for – unless you abandon your talents and strip yourself of all praiseworthy qualities, so that you become stupid, worthless, and to them, innocuous. The result is exactly what they want for you.
So remain firm and patient when facing their insults and criticism. If you are wounded by their words and let them have an influence over you, you will have realized their hopes for them. Instead, forgive them by showing them the most beautiful of manners. Turn away from them and do not feel distressed by their schemes. Their disapproval of you only increases you in worth and merit.
Verily, you will not able to silence them, but you will be able to bury their criticisms by turning away from them and dismissing what they have to say.
“Say ‘Perish in your rage’” (Qur’an 3:119)
In fact, you will be able to increase them in their rage by increasing your merits and developing your talents.
If you desire to be accepted by all and loved by all, you desire the unattainable
Ref: Don’t Be Sad by Dr. A’id ibn ‘Abdullah al-Qarni Pg 40.