I haven't come across a single list of problem from business orgs that lists EU or local taxes, even if particularly high (California, Canada?), as a problem.

Usually, high taxes go hand in hand with high quality welfare state. Contrary to popular belief, the vast majority of business ppl are educated and understand the added value of an accessible publicly funded healthcare, pension and education system.

Commonly listed (and perennial business problems) are: unstable political environment (in the sense that tax law changes every four years, complex legal system, so long term planning is impossible), corruption (meaning you have to know who to bribe to get the job done), crime rates and lack of infrastructure.

Every list of problems I see from economists of all brands explaining why e.g. the UK has such poor economic performance and such a severe cost of living crisis mention the complexity and scale of taxation in the country first as a barrier to economic growth and cause of inflation.