وَلَا تُصَعِّرْ خَدَّكَ لِلنَّاسِ وَلَا تَمْشِ فِى ٱلْأَرْضِ مَرَحًا ۖ إِنَّ ٱللَّهَ لَا يُحِبُّ كُلَّ مُخْتَالٍۢ فَخُورٍۢ ﴿١٨﴾
Turn not thy cheek in scorn toward folk, nor walk with pertness in the land. Lo! Allah loveth not each braggart boaster.
Is pride and arrogance haram?
Haram Speech & character Quran · 2
Short answer
Yes. Allah does not love every arrogant boaster (31:18), and tells us not to walk proudly on the earth (17:37). Pride is rejecting the truth and looking down on people. Humility is the way of the believers.
Evidence
Quran
وَلَا تَمْشِ فِى ٱلْأَرْضِ مَرَحًا ۖ إِنَّكَ لَن تَخْرِقَ ٱلْأَرْضَ وَلَن تَبْلُغَ ٱلْجِبَالَ طُولًۭا ﴿٣٧﴾
And walk not in the earth exultant. Lo! thou canst not rend the earth, nor canst thou stretch to the height of the hills.
This is general information, not a fatwa. For your own situation, ask a qualified scholar.