That is like a scream for help.
12 step program.
First, you need to hit rock bottom ... (are we even there yet? .. 'she just went for it and everything went in' .. doesn't sound like rock bottom to me).
Then 1st step is acknowledge there is a problem ... We're not talking crying your eyes out to Matt Cronin, but making changing to set-up, team, style, whatever.
Right now, it's doing the same thing over and over again, expecting a different outcome. (Einstein's definition of insanity).
Piotr of course doesn't need to leave the team. Everything tells us, he is good for her. He's also turned matches around many many times. But if APDP isn't working out/helping .. surely Caro/Piotr can see the need for external technical help.
If she cannot see, golf WAGging isn't helping her tennis career .. Well, then she is beyond, where she can be helped. It has to come from her and an acknowledgement, being a golf WAG is not enough for having a tennis career.
If she's happy being top 20'ish and a golf WAG, that's fine. And .. maybe that's where we're heading. It would just be nice to know explicitly, so we can all adjust our expectations accordingly.
As it is now, we're trying to read tea leaves and judge comments. 'I am motivated again' .. Fine, but then runs off to watch golf at the first opportunity? Is that being motivated? ... Action ... words ...