A lot of things do suck, but for me at least it's important to focus on what actually sucks and what I think sucks because I'm angry at other things.

Having issues with this state of capitalism we're in is fair, it's a legitimate problem and affects everyone. Even non-capitalist proponents of capitalism feel the effects, but when they look for the source of their pain their vision gets redirected away from the capitalists.

But feeling frustrated with people bringing their dogs to the park is a waste of your energy. I get this way too, I understand it, but you're going to wear yourself down.

My unsolicited advice is to try really hard to find something positive to grab onto. Dogs for example. Find a way to enjoy the pure heartedness of dogs and mentally don't let it touch the problems with humans. Treat it as a sort of pressure release valve when your frustrations with capitalism start to expand in scope, something that you keep simple and straightforward and positive.

That way your anger stays focused.