I agree with you. At least we can be certain it was not the western supplied cluster shells that they promised not to use in populated areas: Ukrainians have been very strict about sticking to thekt promises.
As for Russians we also know they have been lying for as long as we know them, I grep up in a country on Russias doorstep and even as a child I heard my dad joking about them and their somewhat conflicted relationship with facts.
But it wasn’t until this war that I realized that this isn’t just old jokes but todays reality: “We will of course not attack Ukraine!”, “Moskva runs bybits own engine towards Sevastopol”, “Ukrainians shoot prisoners in the knees” (but they have thick Russian accent and a day later a video of the rehearsal video is released and everyone can see how they rehearsed “getting shot in the knees”), “Ukrainian shelled Olevnika” (but no Russian guards were hot) etc etc.
Upvoted, but people did not turn agains Hitler even during the massive massive bombing raids on major during cities.
The upvote is for hope though.