There were also plenty of articles in the UK, from the Independent, Guardian, Times etc. complaining strongly about the state of tennis and men's in the 90s. Also the declining US TV ratings was brought up in the UK. For example I knew from the UK that Wimbledon in 1998 attracted the lowest ever US ratings on record at that point.
The 1987 Wimbledon final between Cash and Lendl and 1991 final between Stich and Becker, had higher ratings in the US than the 1993 final between Sampras and Courier. I remember posters in the past showing NBC charts, highlighting just how ratings significantly tapered off in the 90s compared to the 90s. They also showed how ratings for Sampras matches without Agassi on the other side of the net, were typically poor.
I've always thought it was blatantly obvious that Sampras's 'pursuit' of Emerson's record was hyped up in the US, to try to drum up interest as a result of declining ratings and popularity. After Borg won his 11th grand slam at RG in 1981, the fact that the was 1 short of Emerson's record was mentioned by a couple of publications, but there wasn't anything close to serious hype about whether he could tie / surpass what was considered to be a largely insignificant record. I haven't see a single quote from Borg directly about Emerson's record at that time.
That's why I've always said that while Sampras was such a brilliant player, he simply didn't transcend the sport, like Connors, Borg, McEnroe, Becker, Agassi, Federer, Nadal, Alcaraz etc. The fact that he wasn't involved in any iconic 5 set grand slam finals was surely a contributing factor as well. His only 5 set grand slam final was vs. Ivanisevic at Wimbledon 1998. I think it was good viewing, but it wasn't an all-time classic. Plus there was a stigma associated with Sampras vs. Ivanisevic matches after their 1994 final.
But when it comes to Kafelnikov, I do think Agassi and Sampras were too stunted to actually tackle his actual arguments head on, about prize money as a share of revenue, compared to that earned by golfers, at smaller events etc. Instead they acted as if he was personally demanding more money and 'played to the gallery'. Kafelnikov was undoubtedly right when he mentioned that that he publicly said (regardless of the strengths / weaknesses of his arguments) what many of his peers were too scared to say. Nowadays, players aren't remotely scared to talk about / criticise prize money distributions.