Please provide a source for this statement. The only explanation I heard was the wish to 'reduce e-waist' and that really isn't on my short list of 'interests as a EU consumer'.
That's one of the goal, the other is consumer convenience. There is official documentation
here, including various documents which go in great detail.
E.g. taken from the Executive Summary of the Impact Assessment:
What is the problem being addressed?
The first problem is the consumer inconvenience caused for consumers by the presence of three different connectors still on the market and the lack of charging interoperability.
The second problem is the environmental impact resulting from annual sales of around 300 million portable electronic devices in the EU. The old chargers fall into disuse or are thrown away.
The document goes in further detail explaining what they expect to achieve, what's the value that the regulation would provide, which different possible solutions are on the table, advantages and disadvantages etc...
Again, you might disagree with the reasoning, but it doesn't mean a reasoning was not provided, nor that since you personally don't agree everyone else also doesn't.
So basically, you are saying that the goal of a free market is standardisation. I thought the goal of a free market was to have companies make/develop products and then let the consumer decide where it wants to spend its money.
No, what I am saying is that the EU would have preferred for the free market to voluntarily converge towards a standard solution, but the free market failed to do so and they decided to intervene. Again, from the link above:
The voluntary approach did not meet consumer, European Parliament or Commission expectations, so we put forward a legislative approach.
Compare and contrast with what they are stating for wireless charging technologies:
Furthermore, wireless charging technology is still developing, currently showing a low level of fragmentation, and a good level of interoperability among the different solutions. It therefore seems premature to set out mandatory requirements.
'satisfactory solutions' according to who? I really do not know one single person that had this on their priority list, nor one politician standing in the street saying, "choose me in the EU parlement, I will give you USB on all your devices."
According to the EU Commission, which pushed forward the proposal, and the EU Parliament, which ratified said proposal.
The EU isn't democratic, the fact that one can cast a vote, doesn't make the system democratic or 'legal'. EU parlement has very limited powers, which leads to 'lets make laws, because we can' in the area's they have power.
The EU Parliament is elected by the EU citizens, so it's clearly and undeniably a democratically elected institution. One of the powers of the EU Parliament is electing the EU Commission, which means also the EU Commission is democratically elected through the EU citizen's representatives.
Note that you personally disagreeing with whatever they are doing doesn't change the fact that they are democratically elected institutions.