No it wasn’t just one study. The 2016 WHO trial is just the one that got the headlines because it made for a catchy story. There were several other male birth control studies going back to the 80s and 90s where men dropped out because they didn’t want to deal with the side effects. Things like acne mood swings and injection pain.

In the WHO study around twenty out of three hundred twenty men quit over side effects. Earlier trials saw the same thing a few percent tapping out for the same reasons.

So no it wasn’t some isolated case. It’s been a recurring theme across decades of research. The numbers are small but it’s there. Pretending otherwise just tells me you stopped reading after the first article title.