Negative attitude!
As long as the person looks at things with a negative attitude and in order to criticise, he will never find peace and he will disturb the peace of those around him.
This way of thinking goes hand in hand with ungratefulness!
And ungratefulness results in the loss of the blessings one has!
Do not look at people who are in a better situation than you are, look at people who are in a worse situation than you are. Value what you have and be one of the grateful ones!
Allah (ﷻ) knows best.
Ahmet Şahin Uçar