It's straight from Marx himself, not Lenin.

Sure it is. /s

And who is going to enforce the worker ownership of the means of production without a State having the final say?

The workers? Why do you think that majority rule over something needs to be enforced?

Revolutionary Catalonia lasted less than 10 months as a socialist state before falling. Idk if you can say they successfully implemented proper socialism when they couldn't even make it through one year.

Do you know, why it collapsed? Certainly not because they failed to implement socialism and rather went back to * checks notes * a fascist corporate regime.