Water usage is probably my biggest. Living in a high desert, my wife and MIL see no problem with filling one side of the sink with hot soapy water to wash a few dishes because “that’s just how I’ve always done it”, to watering the grass and plants for hours. All of this makes me mental.
The worst are the sites that just redirect you to the play/app store when visiting on mobile.
I’m surely NOT installing your fucking app after you give me a bad experience (by not showing me the content I’ve received a link to) while I’m a “guest visitor” to your site.