I've been thinking about how to answer this for a while, but I'll approach it from a different angle. The time I (nearly) lost faith in my dev future wasn't because of a technology, bad programming language or an external influence. It was *me*.

The first job I had after the PhD, I was (in the first couple of weeks) tasked with updating various packages on a live Redhat server. "No problem", I thought, "I've done this before many a time on Debian, easy as pie!"

Long story short, I ended up practically bricking the server because I mistyped and uninstalled something I shouldn't have, didn't understand a piece of configuration, then tried to bodge it back and cocked things up further. Couldn't even log in via SSH, the hosting company had to be called, a serial connection set up, etc.

To say I was mortified, embarrassed and had my pride dented would be a massive understatement. I seriously thought I'd get fired on the spot, and that I should perhaps change careers to something where I couldn't cock things up as much.

...but you can't think like that, otherwise the world leaves you behind. So I picked myself up, apologised profusely, took some relevant training, double checked everything I was doing on that server in future and got back to work. After a few months of "proving myself", it was then seen as nothing more than a rather amusing story, and I became a senior dev there a couple of years later.