What? Putin is definitely lying according to you when he says he doesn't want to take all of Ukraine. Russian state media are also definitely lying according to you since they say the same thing. I don't know why you think Putin just tells everything he is planning to do to Russian state media ahead of time, this would be a huge liability, intel would be leaked all the time. And what you cited doesn't even say he wants to annex Ukraine:
Putin doesn't need to leak it someone inside the FSB is feeding intel to the US. And yes Putin would like to annex all of Ukraine, and re-install Yanakovich (sp?).
Whatever it is that he really wants is becoming increasing irrelevant, he has so far united the EU, isolated Russia from world trade, pissed off his Oligarch friends, exposed the Russian military machine as a poorly maintained, poorly led disaster, managed to isolate the extremist wing of the evangelicals and right wing in the US. Lost the propaganda war that everyone was expecting him to win. ( Zelensky is working the media and inspiring resistance brilliantly ).
Nice work for one week.