If you're serious, I'd say language is optional in the first step - at least in Germany. If you manage to find a job here, you may get a visum (Aufenthaltstitel) for many years. A colleague of mine (IT) came here from India around 15 years ago and still only has rudimental German skills. If you want to integrate well with locals, it's helpful of course and you also need a certificate to proof your German for permanent citizenship. But for coming here a job is far more helpful than language skills. And in many bigger or international companies English is the norm anyways.
Universal health care is not EU wide. Quite a few countries do not have that. Bulgaria sits at 15% uninsured for example. PTO is nice, but it is really just a way of paying out money. In the end it hardly matters. If you earn more on the days you work, then it ends up being roughly the same. Mutual assistance is very very loose. Plenty of EU countries have no problem whatsortever to send refugees to die. Homelessness is much more common in the EU then in the US.
At the same time the EU has with Hungary a full blown dictatorship. Far right governments are ruling multiple member states already and are systematically removing workers rights. Greece just introduced the 6 day work week and eliminated a lot of worker protections as well.
I am thinking of states like California, Oregon and Hawaii. As for EU countries I am thinking of Hungary, Italy or Slovakia for example. As for further left that to me means giving more power to the majority of the population. Be that economic or political. Last time I checked none of those US states were activly trying to turn the states themself into dictatorships, which has been very much the case for those EU members.