I would like to share a very recent experience that I had with a Radiolink RC4G, which I was forced to use as a backup system for several weeks while I sent my primary "Luxury Brand" system in for service. I would consider Radiolink to be a huge step up from FlySky in terms of the quality of the signal. Both budget systems share nearly the same frame rates on paper but Radiolink isn't plagued with all the issues that can cause problems with direct sequencing which is what Fly Sky uses. Anyway, I used Radiolink for something like 6 race days over a 3 week period and both my fast lap times and my average 95% consistency remained the same, in fact I had a couple 98% consistency runs sprinkled in too. Don't get me wrong, I have no plans to continue racing with Radiolink for too many reasons than I care to list, but for someone who is in a pinch, a cheap budget system like Radiolink does in fact have the ability to deliver comparable results with luxury brand systems. Some key differences that set a luxury system apart are mostly around the ergos, and yes I agree that ergos can help improve comfort/confidence, this doesn't necessarily translate to faster lap times and better consistency. A focused driver can still be competitive with a budget system, or least with Radiolink in my case.
I have raced with FlySky in the past, and I was burned too many times with hit and miss glitching, I would also get burned by other systems who used direct sequencing to the point where I will never buy another system again that uses direct sequencing