Indeed -- I knew several professional traders who used FTX. At the time, their consensus was:
1) "Probably Alameda has an unfair latency advantage, because they are the designated market-maker, and owned+operated by the same people who run the exchange." This could be called 'front-running' depending on how you define the term.
2) "However, SBF probably won't steal all our money because he is well-known, extraditable by USA, and would go to prison."
Needless to say, assumption 2) was incorrect.