Honestly I trust downdetector more than that. Crowdsourcing always wins.

Downdetector said basically everything was down today (including Google, AWS, etc.) but they aren't affected. This makes me NOT trust downdetector.

That's definitely your prerogative. Internet Insights uses various techniques to analyze billions of metrics gathered daily from hundreds of thousands of vantage points around the Internet to detect outages in minutes, while providing (in the paid product) corroborating evidence based on that collected telemetry to support its conclusions. Crowdsourcing is subject to the vagaries of crowds.