The situation might seem "extremely straightforward" to you, but it is an expensive and time-consuming kind of legal dispute, because it requires discovery of years of business records, expert witnesses in forensic accounting, and likely a trial to establish whose interpretation of key contract terms is the controlling one. That means years and at least hundreds of thousands of dollars in legal work, at the end of which a trial is hardly a sure outcome. Unless the plaintiff is willing to commit to funding that out of pocket, then he'd have to find a lawyer willing to take it on contingency, meaning he'd pay as much as half of any award at trial, after legal costs were deducted. Unlikely the best-case outcome is much, and the worst-case outcome could bankrupt an individual.

"maybe he did win in court and they simply ignored the court order" No, that doesn't happen in countries with solid legal systems, if it's a corporate defendant with easily identifiable assets.