It depends what parts of Slovenia you're in, but it's also worth considering that the Slovenian far-left is comically similar to American far right. A lot of them are anti-vaccine and anti-lockdowns, they are pro-russian and anti EU/NATO.

We call them tankies because their fascination with communism is more revolved around stalinism.

Regardless, I do think you were unlucky though because it's not really the norm. Unless you go out in the countryside, you're more likely to find progressive youth than far left or far right anomalies.