There's a lot of people here claiming that their personal use is representative of their country, or of Europe as a whole. I get SMS from a lot of people. You don't, probably because a lot of the people you know are on Facebook/Whatsapp and it's more convenient for them to stay with that platform. That doesn't mean that they don't use SMS for anyone else. It just means that you are bubbled.
Born & raised in the EU, have had a phone for 25ish years. Have never encountered SMS spam. Most I've had is 3 or 4 cases of SMS phishing attempts (which isn't spam).