Do you agree that our life as developers, is miserable?

Not if you find reasonable company to work for. Good companies find ways to keep top talent and keep them happy. The larger and more complex the code base is the higher the turn over cost.

I think developers get a lot of perks that many not every type of job gets. The problem is when companies think its ok to work their employees extreme hours until they break. This is bad no matter what type of job.

It depends on the company, but I'd say there are worse jobs.
I enjoy being a developer, although sometimes it can get really stressful.
Why do you think a dev life is miserable?