it's the case over here and it's EU-wide for electricity providers

I find it interesting that this is a good thing in the US and most of Europe, but in France this majorly fucked our electricity market by forcing the (mostly) state funded electricity producer into selling their electricity to some companies that provide no value aside from being an intermediate between the producer and the consumer (they are not required to produce their own electricity to buy some from EDF at a discount, and they are even allowed to sell it to consumers for less money than the lowest price EDF is allowed to charge when they are doing the same thing, because of some dumb regulations I can't remember).

All in the name of the free market because "monopoly bad", even though electricity production and especially distribution is, as you said, a natural monopoly.