Had a hard day; a rough day at work and some weird emotional reactions to simply being hungry.(which is out of character for me)

My job is just a simple $8/hour job I got after a friend wanted me to apply at the sweets shop they were excited about coming to town. It is strange having a job you did not have any strong desire to have. Especially when you did not need the work. I am sticking to it because it would be nice to have more normal work experience on my resume in case I need it. However, you get to see how managers interact with an employee who they think wouldn’t leave because they need that money. It isn’t abusive, but it is often rude.
I wonder how easy it would be to create a friendly work-place if where I work is considered, by my more experienced co-workers, friendlier and more pleasant than their other experiences. I hope the owner either realizes, or when I do eventually leave understands what I tell them, that the managers and fellow owners need more training themselves. The employees need practice, but the owners and management really need to learn a smoother way to communicate or I worry about the business surviving.