Trademark? Why would that be a problem? Sure, any complex system has some bad cases, but we don't see thousands of innovative companies shaken down and destroyed for the corrupt benefit of trademark litigators.

Likewise there are problems with copyright, but -- unless you're really an infringer -- not on one thousandth the scale of patents. And boat hull registratons, trade secrets, plant breeders' rights, design patents, and trade dress are similar. It's only utility patents that are rotten and systematically corrupted.