> Most Europe has way too high electricity prices.

Way to high compared to what? Some countries do not even have a problem with prices but with capacity (Netherlands). They would be willing to pay but they do not have the grid to deliver where the thing is needed, and it's hard to build new grids in high density areas.

> It seems logical that ending the use of existing coal energy infrastructure lead to an increase of prises.

But doesn't this depend a lot on planning and investing in alternatives rather the just closing or not the coal? Sure, if you just close one source and leave everything else untouched prices will increase, but doesn't sound like the smartest approach overall...