Prepare to be much worse financially. You will earn less, pay higher taxes (as percentage) and will feel much poorer. Cars, especially nice ones, are much more expensive (in absolute numbers, not only as percentage of income) to buy and own. Petrol is several times the US price. Rents are higher in most cities (at least compared to income). Maybe only SV is worse compared to Europe. All tech gadgets are more expensiv…
1. All prices in europe include tax, unlike in the US where it's customary to not include tax in the price and pay it at checkout. Stuff tends to be more expensive not just because of VAT but also because of shipping prices and extra consumer protections such as mandatory 2 year warranties.
2. Just like in the US, rent varies wildly. In Athens you can pay 100€/month for a studio. In London, you'll find that same studio for 10-15 times that depending where you look. "Compared to income" IME it's about equal if not better - please cite your sources.
3. Healthcare is unquestionably of excellent quality across the board. I've lived in France, the UK, Greece, Sweden, there's no exceptions.
4. Petrol prices are kinda irrelevant when you don't need a car. European cities are far, far more tightly packed than the west coast. In all capitals you can get all your stuff done by foot, metro or cycling.
What you're somehow forgetting however while complaining about earnings is that as a US citizen, you need to watch out for double taxation when moving to a different country. So I don't know, your post here is actually super counterproductive.