The worst technology i had to deal with was probably a piece of hardware. It was a mini-pc combined with sensors and digital IOs and thus, it should have been able to do process control all by itself.

At that time, there was hardware that did that, but this one had an intel cpu, windows embedded and some powerful libraries pre-installed.

Sounds good, didn't work. The thing was so unstable and buggy and crashed on everything. The sensor part had lots of parameters and the right order was trial and error, documentation didn't match behavior, fixes promised but never delivered.

Lucky for us: it was just a demokit, no real project.

I still remember it with a smile. We got in contact to that company at a trade fair and they had most impressive booth. I also remember their companies image movie from their homepage with developers in dark labs with holographic monitors and the boss in his shiny bright office as he looked out of the window and quoted a famous german author.

Hilarious and sad. :-)