there is very little latency arbitrage going on in prop firms unless they are HFT firms. Execution delay and even minor slippage resolves that. The news rules kill any outliers.
Your biggest "mistake" was to make well above 10K in TFF. They are known for creating a lot of troubles and sometimes not paying >10K, finding excuses in IPs, trading history, ...
a lot try latency arbitrage in all the different possible ways (and that is a big amount of possible ways). other try use volume advantage (like get big volume to price of small ...