Fortran

Raised as a usability problem by 3 people on Hacker News over 8 years (2015–2022), in 4 threads.

People raised many different problems with Fortran, but no single problem has yet been raised by 3 people in 3 different months and threads.

Unreviewed issues were grouped by machine: Claude Haiku labelled each comment as a usability complaint, named what it's about and summed up the problem in a line, and a small model grouped similar problems. Nobody has checked them by hand. Expect mistakes.

The newest 4 complaints

The C-Fortran interface is horrible to use, hard to work with2022-04-07
Resizable strings are painful to use, requiring constant trimming of trailing spaces before printing2021-04-29
Handling strings is a major pain; arcane details needed even for defining number precision2018-11-27
Hard to learn Fortran syntax due to scarce online documentation and changes between versions2015-07-19