part of it is probably that some things that US unions have to fight for are protected by law in europe. as far as i know at will employment doesn't exist in europe for example. i hear in france it is almost impossible to fire anyone at all.
in germany every company with more than 50 employees has to form a workers council that gets a say in how certain things are done in the company. they deal with things like work conditions, safety, office benefits (do we want a rec-room or better food in the cantine?) without any union needed to step in. that reduces unions to negotiating collective pay and related questions like reducing work-hours or other topics that are relevant for a whole industry, not just one company.
i also believe a german union would have a hard time to force a company to hire people that are not needed for a project or even influence who the company can hire.
but apart from that, even in europe not all projects go well. politicians that try to profile themselves by attracting large projects, missmanagement, are not uncommon either.
as the article says, for example germany has similar problems. like the Fehmarn Belt Fixed Link between germany and denmark. denmark ratified the plans in 2015. germany took 5 years longer. local communities, a few shipping companies and individuals sued to stop the project. one documentary made the joke that a project that gets done in denmark in a year, takes a decade in germany.