First time playing sims 4. My Sim is angry a lot. Why?

[Karcel]

Started my very first game of sims 4. Managed to build a small house with standard kitchen, living room, bathroom and bedroom.
Got a job in the military and I am doing quite well there, already got promoted 3 times.
However, my Sim gets angry a lot! I don't know what I can do about it.
When my Sim goes to work with all his needs met he gets sad at about 50% time left at work and then he gets home and is "Very angry". Why? It doesn't tell me why he is angry.
All it says "I am sick of the voices in my head telling me what to do." and "Anxiety because of unfulfilled dreams." What dreams? What are his dreams? Where can I see?
I also couldnt take part in any festivities at all. The job, the Sim's basic needs that need to be fulfilled. Takes all the time of the day. How in the world do I find time to fulfill these festivites missions?! And everytime I don't do them I get a debuff and my Sim is sad.

If I lived my Sim's life then I would be over the moon.
Minimalist but decent house.
Good job and being promoted rather quickly.
Living on a cozy island in a nice town.
Friends in the fitness club who love to interact with me.

Whats my guys problem? How is he so sad? I tried to model this guy after me. Only thing I am missing is a pet.

Also when I google "How to make my sim less angry" all I get is "How to get my sim angry."
Apparently I am very alone with this problem because noone seems to have asked this before and everyone wants to know the exact opposite.

[76561198213095365]

There is also the carefree trait as well which should prevent your sims from ever getting tense. While it may not prevent your sims from getting sad or angry it does at least prevent them from getting tense. I noticed that the wants and fears may sometimes cause your sim to get tense in addition to angry/sad.