First, the EU Commission has way too much power, and honestly wants to play dictator. Look at ChatControl: Voted down more than once, but the Commission just repackages and resubmits, with some dirty backdoor tricks, until they get it through. Parliament is not allowed to propose legislation, only the Commission.
Second, regulatory hell. The continual avalanche of regulations out of Brussels cannot be overstated. People make fun of the bottle caps, but those are absolutely illustrative of how literally everything is over-regulated. This is one of the main reasons that European industry is struggling.