i feel like humans are so hardwired to be social that there will always be a natural tendency towards negativity and bitterness especially if the person has dealt with a lot of emotional trauma, neglect, and lack of any social support.
i always wondered how some of these people managed to survive this world and still maintain positivity towards themselves and others?
from what i noticed the most happy people have healthy and balanced social and family support in their life while the ones who don't either hide it very well by appearing happy, overcompensate with their pride and ego, or are just outright bitter and negative people.