Happy is a huge pressure. It's sold as a concept to keep people buying things.
But in the here and now, what keeps me content, is our teens whom are an endless source of chat and entertainment.
Our tatty little house, that's full of books, games, tv, good food, time spent together. We don't need a bigger house it's too much to maintain.
Feeling the weather when you go out walking.
Enjoying messy human life around you, or expanses of nature, or an amazing sky
Reading, feed your brain with information and fiction.
Watch documentaries, I would suggest you look at the ones about the evils that is social media and body image, understand OP what you see online is filtered, pretend, fake, fake everything, fake nails, lips, tan, holidays, rooms.
The overwhelming majority of humans are just average, that's it, that's what average means.
If you want to go a bit more outside your box, we have taps which the water is safe when it comes out, hot showers in our house, shops with fruit and vegetables from across the globe, humans are inventing things all the time, the progress in medicine over the last 100 years has been phenomenal. Look at people who do things like that.
The reason we can all sit at home, safe, growing to old age is because of clean water, vaccines and antibiotics in a large part. Big houses, nice cars, fake tans, weird shaped gym bodies, are not that impressive really.
Go for a walk, donate some good quality stuff to a charity shop, go to the library get a book, take yourself for a coffee, watch the world go by. You are part of a crazy, unique planet for a small number of years, sitting around thinking "it's not fair I want a big house and to be thin" is such a waste of your time on it.