The absolute worst experience i have ever had with a dev technology was a mixture between notepad, pgeLua and a PSP.

Back in 2010, i coded a game called "ReapeR ValleY" for PSP (homebrew). I had no idea what an ide was and i have never really coded before that.
That resulted in a 1500+ line code that in a single file written in notepad. The performance was horrible since it just ran through the same lines of code over and over again with arrays filling up and flowing over with data.
The entire game was written in pgeLua (a supposedly more game friendly version of Lua) and ran on the PSP.
The PSP needed to be overclocked in order to run the Game smoothly. I had to restart the entire PSP when the game crashed and i already installed a custom bootscreen that basically shortened the time to boot.

You can still find the game online hosted on various websites. It was my very first and unexperienced attempt at coding, but it worked.

Moral of the story: you can code with just about anything, but when you don't inform yourself about IDEs, frameworks and such, it might be painful.

... also Notepad is pure brain pain to code in.