One can be very sceptital of Jaro, but if you read articles or interviews in the Polish press coming from reliable people of various political backgrounds, you would have never arrived at such a conclusion.
I came to the conclusion a long time ago that Jarek knows how to play the domestic game very well (by simply repeating what the Communists did, but dress it up in "patriotic" language instead of "internationalist" language), but he's clueless internationally. It reflects the complete inability of Waszczykowski to build a foreign policy, and also reflects the inability to understand that the EU will find a way to pressure PiS in ways that he hasn't contemplated.
The biggest mistake people are making are assuming that he's a reckless idiot. He's anything but - a stupid person wouldn't be able to build a party like PiS that attracts almost fanatical support. He's spent 27 years building this cult, not just 7.
I agree that he wants Tusk in prison, but I think he's also realised that it's going to be nearly impossible to do so without a Polish Majdan taking place.