I find my "focus" is not because I am miserable but I find the things I hate to be the causation for my misery.

It's not easy being optimistic when you are beaten down by a mob of people that cannot be well enough defended against.

While that might be true, it sounds a bit woo. My feeling is that when you're miserable, all you can think about is what is making you miserable, since it's consuming you. When you're happy, your focus is on what makes you happy. Simple as that.

Pretending you're not in a miserable situation, searching for a solution and instead pretending to focus on the few things going well doesn't really remove you from the miserable situation and miraculously put you in a happier one.

You can't just say to a person deep in depression, it's their fault for not focusing on what makes them happy... That could actually remind them why they are unhappy as those things seem to be out of reach for the moment.

Focusing on reality and the goal of getting out of the misery in the best way possible and into a better situation takes reasoning skills, but yes, adding in more things that make us happy is always a good idea!

The most content people try to find the balance.

Effective people focus on changing the things they hate about life, including opening the eyes of dumb people to the truth that they are not really happy just willfully ignorant of reality.

Speaking as a miserable person, sayings like this are why we hate happy people. Happy people just aren't paying enough attention to how miserable life really is.