"Have you stopped beating your wife?"
Seriously, what a dumb question. The answer is "neither": at the time of its release, IE6 was great. It was way better than its only real competition, Netscape 6, which hadn't seen updates in years. Yes, it had bugs, but all software does. If Microsoft had just given it regular updates, it would've been fine. The issue with IE6 was not that it was bad ab initio, it was that Microsoft abandoned development when they felt they had no competition, so it slipped farther and farther behind web standards.
When disagreeing, please reply to the argument instead of calling names. E.g. "That is idiotic; 1 + 1 is 2, not 3" can be shortened to "1 + 1 is 2, not 3."
Why is it dumb? Because it packs in an assertion that is implied true, without asking.
An appropriate answer is "Mu". Or 'unask the question'.
They did give it regular updates throughout that period; those updates just never targeted web standards. I'm honestly wondering whether that was through explicit desire (it's a valid business strategy), willful misdirection (not prioritizing "the web"), or management incompetence (inability to deliver desired standards compliance). I've never read / heard anything definitive to explain which of those happened.
The web version of Outlook was one of the, if not the first AJAX application. IIRC, IE added XMLHttpRequest to support web Outlook.
https://www.quora.com/How-did-Internet-Explorer-up-until-ver...