The article states that RH cost its consumers more in bad trade execution than it saved them in commissions. How are you sure this didn't happen to you?
I trade in multiple platforms and I put in limit orders (RH doesn’t even allow market afaik). To be fair, I am probably not your typical trader since I’ve been a fintech developer in the past as well as have been involved in analyzing many SEC cases for/against major financial institutions. I will say this: it’s extremely hard to prove execution quality on options trading let alone doing it in 2020 when the market was so volatile.