Your analysis points out some real problems, but I think they are more systemic rather than just cultural. (This is not to say that the cultural issues are not real)
1. Startups mostly leave because Europe doesn not have a private capital ecosystem and hence entrepreneurs can not get sufficient funding for growth.
2. There is some truth to this statement in the sense that some people have this mentality but is not true in general. There are profitable companies in Europe and there are jurisdictions (Denmark, Ireland, Estonia, etc) where it is reasonably attractive to have a company. The data does not show that this makes a difference: the biggest startup markets are still in the larger countries that have a larger (capital) market, even though these countries are usually more hostile to business.
3. Yes, that is the case with all government subsidies, however often their founding documents claim to wish to support small and new things.