Here’s the best solution- throw it out and never give them your money again. And make sure everyone you know never buys a Roku product again. Spread the word on social media. Maybe facing financial ruin will wake them up.
I can hear the Roku fanboys complaining now. Well they had their chance and did nothing. If people stop complaining and continue to buy their junk, it will validate their “screw what the customer thinks” policy.
Drastic action? Sure. But what’s the alternative? Re-encode hundreds of movies? And what if another firmware update breaks your files again?