Their gamble did not pay off because they mis-underestimated Russia.
Now the check has come due, but it was inevitable assuming Russia was always going to do this.
Regardless, this is the result of the Russian invasion.
Like all economies we depend primarily on fossil fuels. It's unfortunate that we can get it ridiculously cheap from Russia but that's the free market. We are working more than anyone else to remove all dependency, but don't start pointing fingers at us just because we purchased the cheapest fossil fuel we could for ourselves. We don't all have the luxury of invading oil rich countries, or have massive reserves ourselves.
Should have EU relied less on US and actually spend those agreed upon 2%+ of GDP like Poland, Finland and others have and be self reliant? Yes. Very much so.
Perun has an interesting video about it EU reliance of US military support: https://www.youtube.com/watch?v=BFoJGHZEqAk