On top of my head there were quite a few. Gilbert, Cancellara and other classics or stage race exploits in the first years of the decade not mentioned, since I didn't follow the sport then.
"Turned off tv/intelligence insulted" alien:
Froome Jafferau 2018
Jaw-dropping alien (random order):
Froome Ventoux 2013
Froome Ax-3 2013
Froome Pierre-Saint Martin 2015
Froome/Contador Col du Béal 2014
Foliforov MTT 2016
Van der Poel Amstel 2019
Alaphilippe Tourmalet/Pau ITT 2019
Shaking my head "this is crazy/ridiculous" alien (random order)
Simon Yates Giro 2018
Valverde spring 2017
Voeckler Galibier 2011
Gilbert Ronde 2017
Purito Vuelta 2012
Contador Cuitu Negru 2012
Landa Giro 2015
Contador Lanciano/guardiagrele raid 2014 (that one I enjoyed tho)
Dumoulin Giro 2017
Dumoulin Tour 2018
Thomas Tour 2018
Alaphilippe spring 2019
Fuglsang spring 2019 (especially Fleche Wallone)
Froome Zoncolan 2018 (first time I felt sympathy for him, but then Jafferau happened and back to square one)
Quick step and SKY the most ridiculous teams of the decade. SKY/INEOS win though, because Quick step only turned crazy some years ago, whereas SKY/INEOS have been crazy since 2011 Vuelta. I really wonder what happened in the weeks between the Tour and the Vuelta that year...