It’s a bigger problem in the States than elsewhere. In the US, awarding legal costs is the exception, not the norm, so someone with a lot of money and access to lawyers can basically intimidate a defendent into avoiding court. In the rest of the world, courts are much more likely to award costs to a defendent who has done nothing wrong - if you file a frivilous lawsuit and lose, you’ll probably have to pay the costs of the person you tried to sue.
This guy’s in Germany, so I think he’d be alright if he clearly won. The issue, however, is that courts aren’t really equipped for handling highly technical cases and often get things wrong.