Why don’t apartments come with heating and cooling?

I moved into a new apartment recently. I’m basically paying most of my paycheck in rent at this point. But it’s close to my workplace and other amenities.

There’s no fan, no air conditioning or central heating or cooling. I can’t bear to spend time inside the house during peak temperatures. It’s hot and uncomfortable.

I’ve tried buying a fan and opening all the windows. But the heat just seems to get trapped inside.

Prior to this I lived in another apartment which had a single air con in the living room. If I left my door open I could maybe get some cool air into my room.

Am I expecting too much and this is just what apartments are supposed to be like?