arielext
Headphoneus Supremus
I had to do this once for the exact same reason. Kept the headphones for another day or 2 just to make sure but every time I put them on I had to put the off within 15 minutes due to serious neck pain issues. The sound was nice and transparent but the comfort ....Indeed, the first time I requested a return within one hour :/ I'm really impressed how they can make that happen.
The cans? Audeze lcd2c closed back.
OTOH I don't have any issues with the 450g weight of the Sash Tres, which with some mods are my actual most comfortable headphones. Besting the top range Beyerdynamics and more, for me.
One other headphone I really disliked due to comfort is the audio-technica A1000Z, I never got a proper fit with those.