They find fault with whatever he does and how he does it. They have no evidence of fraud but say he must be scamming because he does not do what they wish him to do with respect to third party tests, open disclosure, academic studies, etc.
That highlighted word right there is why you fail at understanding our objections, and why you continue to fall foo what is (to the rest of us) an obvious scam.
The things people have listed here - proper calorimetry, proper monitoring of input power, proper monitoring of radiation output, proper analysis of the isotopes in his powder after test test - aren't just what we "wish" he would do;
it's what he must do in order to do real science.
Proper measurements, done by the correct instruments, carried out in the proper manner, are absolutely essential to doing real science. Without such proper methods, there's simply no way we can, without being in the room ourselves, determine if he really has anything real happening.
Now, why would he, for over two years now, consistently refuse to do proper experiments? It's not like he hasn't heard about these problems; they've been raised in pretty much every single venue that has bothered to discuss his claims. The only reason he has is that he doesn't
want to do proper experiments.
And why would he not want to do proper experiments? It's not because he doesn't want to convince people his technology works. If that were true, he wouldn't be doing any demonstrations at all. The only rational reason he could have for not wanting to do proper experiments is that he knows his technology doesn't work, and he's determined to hide that fact for as long as possible.
But, as has been said, we don't expect you to ever acknowledge that. I understand Rossi's perfectly rational reasons for carrying on as he has - the scam won't work otherwise. I despair at ever understanding your reasons for continuing to fall for his nonsense, however.