This is good stuff. If these steps fail though, you're in a dysfunctional software development shop and probably need to leave. I say start looking immediately AND try the above, just so you have more options.

Not every development shop sucks. I've worked in good and bad ones, and bad ones I didn't know were bad until I found a good one.

And turn off your phone (or just stop answering work calls) at close of business Friday. Sounds like you deserve some slacking off.