IE6 wasn't so bad. It could do everything in 2001 that practically every site needs today, and pretty intuitively if you didn't also support other browsers. But

IE6 wasn't so bad. It could do everything in 2001 that practically every site needs today, and pretty intuitively if you didn't also support other browsers. But dealing with emerging "standards compliant" browser bugs alongside "the de facto standard" IE6 bugs in the same code, and eschewing table layout before CSS was up to the task, that was a nightmare.