Sure!
Edit: many reasons including: not enough hugs as a kid, lack of sleep and healthy eats, low tolerance for fellow humans, petty by nature, one thing went wrong early in their day and they let it get them down, maybe mental illness like sooo many straws one at a time day after day until "the last straw broke the camels back?" or they might just be pessimistic due to upbringing and main influences?
What can you hear?