> Here in Belgium, 80% of enterprise accounts use MS over Google and I genuinely don't get why. (Without getting into the fiasco of not really having an EU alternative to either of those)

Maybe because those enterprises already used on-prem AD? It's much "easier" to have a hybrid monstrosity combining on-prem AD and Azure AD than on-prem AD and Google (or anything non-MS, really). Plus, MS is already a supplier, so for large, bureaucratic entities, they already have a foot in the door.