I just finished reading the last chapter of the DevOps Handbook, its an eye opener, but not an easy read. And still recommended.

I've been reading this book for the past year and a half, little by little. It was hard since I started understanding why my work was so frustrating (I'm in System-Cloud-Ops position). The book made sense, while the work did not, it got harder since the book provides solutions, but whenever I dicussed any solutions with management they dismissed everything.
I started to initiate improvements by myself:
Prioritizing tasks I thought were more important to improve the way of work - do now and ask questions later... I got yelled at, I got my managers angry, but afterwards more often then not they admitted I was right.
To make it possible I worked overtime and on weekends, trying to prove a better way is possible, by implementing a long term solutions to solve problems instead of workarounds, automating a lot of stuff, creating labs, preparing presentations and documentation.
Time and time again I tried to pitch more ideas related to DevOps but the managers didn't care...
I know now my burnout started 8 months ago slowly, my hairline started receding, I started clenching my teeth (the doctor said stress was the cause) which was very fainful.
I continued to work but I noticed I was also more cynical, frustrated, and tired.

In the process I neglected myself.
So finally after 2 years and a half I quit my job, to focus on myself, at least for a little while.
I hope in my next job will be better.