Last year, we had to do a big university project in randomly selected groups (5-6 students in every group).Three of the five guys were completely useless, I mean, both the other competent guy and me wrote around 20,000 lines of code each, the other ones wrote around 500 lines of code (combined).
After our first few meetings we quickly knew that we have to give them a small task which was so trivial that not even they can fuck it up. But we were wrong. Oh boy, so wrong.
They simply had to code the excel export of the data, which means they had to use two functions from a library and pass the correct data. But their solution was so bad, I lost faith in humanity and was fascinated by it at the same time.
For example, there was this simple class "Room", which had a few properties like size or number of seats and a few getter/setter etc. That was a core class and written by the other qualified guy. So how did the others fuck up the excel export? They somehow rewrote that class in German (although the other code was completely in English), implemented a function for each property that would write its value to a hardcoded cell in a hardcoded excel file.
And this was just the tip of the iceberg. Needlessly to say that I had to rewrite the whole export in the night before we had to present the project.

"we can't add that feature, it's too hard to be modeled with UML"

...yes, it makes sense

I always procrastinate a lot, but often it's more like taking a creative break so in fact it can make me more productive once I get back to my desk and start "doing actual work" typing code into my keyboard again.

Procrastination becomes unproductive when I have reasons not to do the work, like it's an rude customer, uncooperative team leader, a useless requirement or involves inappropriate or terrible tech stack and legacy code.

Sometimes all of that comes together, but I found even in that situation when procrastinating on devRant and swearing every other minute, I seemed to be above average compared to my team mates who probably felt the same.

Most of us quit the company at some point of that ongoing project.