Being tolerant, gracious, and humble makes someone easy to get along with and communicate with others. Another good impacts is صِلَةُ الرَّحِمِ will be more easily thus made good people come along and supporting each other. Those behaviours are somehow considered good behaviour. Narrated HR. Ahmad: The Prophet (ﷺ) once said “Everything which considered as a good things by humankind will be considered as good things by Allah, and Every evil things considered by humankind also considered as evil things by Allah”.
Being gracious will delight people and bring goodness in the life even afterlife. That is why The Prophet (ﷺ) said “Allah loves people who genuine help and gracious when they sell and buy things, owe or paying their debt”.
Those three behaviours considered as uncomplicated keys of happiness, in Islam uncomplicated or being easy means not being an intricate person while helping people. Appropriate bargain, makes suitable price, being responsible to pay their debt, and tolerant to someone who asked for help.
“Being tolerant and uncomplicated to others makes your life more happy and peaceful. It reduces the willpower of self gains in دُنْيَا”