I think it's somewhat irresponsible to throw out accusations this big without even feeling the need to offer any evidence for them.
FWIW I once summed up the various fines (anti-trust etc.) doled out by the EU by country/continent. It turned out that US companies were, collectively, fined slightly less than their share of economic activity in the EU, while Asian companies were fined more and EU companies were about level.
This corresponds rather well with a non-corrupt process largely blind to companies' nationality, assuming that US companies are rather well-regulated in the US compared to Asian companies.
I haven't done the reverse for US fines of European companies. But, subjectively, the cases that made the news (mostly VW and Deutsche Bank) gel rather nicely with my (Germany-based) impression of companies with malignant corporate culture and do not require any nationalistic motivation to explain.
I know it may seem like a minor point in this context. But if we always assume all institutions are corrupt, that becomes a self-fulfilling prophesy. Institutions such as the court system and, more generally, the rule of law, are the reason we (some of us) can enjoy life in peace, and shouldn't be torn down just by empty cynicism.