The Russian MOD is as accurate as the Ukrainian, IMO.
IFF they provide photographic proof, then I'll say they are correct.
I don't look at photographic proof, which can easily be faked or by photographs with a false context. By the way, there are plenty of Russian sourced photos of captured weapons, and there might be a hint that some Ukrainians are enterprising and selling these weapons to the Russians and to the weapons black market.
While both sides are undertaking propaganda, historical precedence suggests to me the side that undertakes the most voiciferous, the most loudest propaganda is the side that's more desperate and losing especially if the leader is constantly begging for aid and arms. That for me looks like Ukraine.
Also I look at strategic movements and positions. Who is taking who and occupying what. So far, despite having more battle tanks than the Russians, with Ukraine over 3200 at the start of the campaign, and still getting reinforcements, their inability to mount a credible large scale counteroffensive against the Donbass and Lunetsk regions, inability to rescue the Mariupol pocket, and so on, suggests to me that the Ukrainian position looks far worst. I am not asking that Ukraine should mount a tank offensive to Moscow, which by the way, the Germans did with far less tanks, but for goodness sakes, at least mount an armored offensive right in your own territory.
As Russian air and missile attacks often focus on ammunition, fuel and weapons depots, the loss of fuel can be crippling to a tank formation. This is classic World War 2 tactic where the Soviets hit German fuel depots behind the lines via air power, which cripples the ability of German tank columns to move.
Training of new weapons can take weeks, if not months. To suggest you can train civilian militias to be proficient with them in a few days is nonsense. There is a report or alleged video of a Ukrainian solder trying to fix his NLAW with a battery, and commentary that the weapons being provided are not reliable. Another report, again, alleged, is that the weapons are not user friendly or easy to use (understandable when comparing to Soviet era weapons because Soviet era weapons are meant for peasants to use.) Despite the thousands of ATGMs that were shipped into the Ukraine, it also seems that the Russian tanks are far from destroyed.