My philosophy is simple. If these guys never existed, worse guys would take their place. No matter how bad someone is, their presence there contributes to the tour being better.
So at an individual level no one deserves criticism for being limited or not performing as expected.
The problems arise when people either create expectations on a player or start comparing.
I am a hardcore Novak fan, so I have no reason to downplay Medvedev or Alcaraz, but I simply cannot stand when they get way more credit than I believe they deserve. It's subjective here, but I tend to react when I feel people tend to go off the boil.
I took quite a bit of satisfaction in Carlos's downfall to Novak in RG and Med in USO (well, not the cramping part), because the hype was becoming insufferable.
Yeah, either the hype or the negativity is what kills me.
Novak's match threads breed toxicity, it's unbearable.
Then there is the hype how Carlos is gonna be next 2nd coming on earth.
Then all the endless comparisons and debates done in the moat disingenuous way.
There really is little balance and extremist and fanatism taken to a new high.
I think I will skip the tennis related explanation on this as I have said my piece probably way to many times.
Or perhaps, to keep somewhat concise, the physical decline affects certain things, your legs get slower and less explosive, resulting in less sharp movement, your core explosiveness declines, resulting in a less explosive torso rotation, so a lesser ability to generate weight of shot and also to redirect pace.
These things gradually decline as a player ages and starting from around age 25-26 for those who were fully commitent to their physical game from the get go, especially someone like Djoko, Nadal or Fed.
So there are certain things an older player simply does worse because of...age. And this is inevitable for any player. And they can compensate by improving the technical part, but some things become hard to improve because are tied directly to physical game.
So you go on improving auxiliaries, tactics and maximize your mental game.
But then Novak was so so good in his prime, a 10 years decline is gonna be felt, because it's a drop-off from Mount Everest, still has plently of height to fall from and why he is still so good at his age
I'll be brief...er, anyway, as this could keep going. Well, maybe not.
To generalize, I'm much more accepting of hype (excess positivity and enthusiasm) than I am of derision, which I'm not accusing you of. Of course, if someone is going way overboard, and repeatedly, that is a little hard for me to take. In my opinion, what happens too often is that negativity becomes the order of the day here, and on all social media. I tried participating in 5 or so match threads here, and while there are some very knowledgeable tennis fans...and the occasional incisive comment... the majority of the comments were really out there. I don't mean clever and witty, but things like watching great rallies...perhaps, 20 shots or more with every inch of the court covered by both players, and off a great "get", a forehand whistles inches wide. And you'll read, "Man, his forehand is horrible today." Or a string of comments that are so player-centric. And I can distinguish between player-centric rooting (nothing wrong with that) and player-centric analysis that views the match from such a limited prism.
Again, I can appreciate that in the great majority of cases, there is physical decline at a certain age, although that single age (even for a given sport) is hard to pinpoint. and it varies by players within those sports. I don't closely follow sports like swimming and track (I like both, but don't keep track of records or follow them year-round). What I'm rambling about is that this may be able to be measured much more clearly in track and field or swimming than in a sport like tennis. But even then, prime/peak ages may still differ by event. And tennis is a very different type of sport.
Here's where our opinions diverge. There are outliers in any sport, and I do believe that Novak is an outlier in tennis, and even Roger and Rafa were to some degree. I would agree with you and most that I don't think that, today, he could win the 2012 AO against the same Rafa. I also don't think that he would try to outlast him if playing him today. In track, you can't shorten the 1,500 meters, but in tennis, you can try to shorten points with a beefed-up serve and better, more frequent net play, more drop shots, etc. And in addition to that, Novak can schedule more wisely (harder to judge given Covid, but you get he drift) to peak during slams, and obviously, he (and his two greatest rivals) knows/knew how to peak for slams.
All of these, to me, compensate for any physical decline, and his quickness and flexibility is still top-notch. So no, especially at the slams, I just don't think he's lost much at all. And his aura, if you will, has also become tougher for his opponents to do battle with, which also helps him.