I believe the “evidence” he listed could either be obtained simply by looking at the number of solves, or was completely useless information. For example:

• ***had a large performance gap between contestants / some problems were hard / some were easy. (The problems were already ordered by difficulty & This is just a personal judgment and should not be taken as a reliable reference and you could also see the number of solves, so was this useful at all?)
• *** did not solve problem ***. (Was this useful in any way? Could it help anyone solve or pass a problem?)
• The scoreboard was not misleading. (Was this useful? And couldn’t you tell that just by looking at the scoreboard?)
• There bugs on CF. (Was this useful?)

If you participated in the contest, I believe nothing I said would help you solve any problem. If you did not participate, then it was even more useless.

It was just an online contest. As long as you did nothing unfair, such as cheating or revealing solutions, I think reasonable discussion should be allowed(for example, saying that *** was rank 1 or that *** solved problem ***), since all of this information was public.

As for the reused problem, someone did mention it, but they immediately realized that the two problems were fundamentally different.