Where on earth did you get this nonsense from? That's not from mossad, that's from some Russian troll in a basement somewhere. How can Ukraine lose 6,320 tanks and AFVs when they barely had 1500 to begin with? 
There have been over 9000 Russian military vehicles lost, each case confirmed with photographs. Who knows what the figure is without photos.
https://www.oryxspioenkop.com/2022/02/attack-on-europe-documenting-equipment.html
Ukraine have emptied the stocks of old soviet weapons from ex Soviet countries. It has all been destroyed. Currently begging for yet more NATO tanks, planes, artillery etc. The numbers are in line with observed reality. Ritter, MacGregor, Alastair Crooke and other reliable military/geopolitical analysts have been reporting these figures from the start. The widely reported and filmed "press ganging" of new conscripts in Ukraine who are on their 9th or 10th wave of mobilisation also tells this tale.
Only indoctrinated and censored westerners believe the obvious lies being told by Ukraine/NATO.
Ukrainian losses are horrendous. Modern industrial warfare is an artillery war(lots of it) and Russia is firing 6 to 8 times more artillery than the Ukrainians can sustain. It is obvious that Ukraine are taking massive losses and those being sent to the front line now are ill prepared conscripts being used as fodder. NATO are criminals sending more and more Ukrainians into the Russian meat-grinder with no chance of success.
Open source intel from many sources all point to the same inevitable conclusion of unsustainable Ukrainian losses. The scale of defeat is becoming impossible to cover up. The scale of losses was reported by The Guardian(a propaganda outlet for MI6) from June of last year;
https://www.theguardian.com/world/2022/jun/10/ukraine-casualty-rate-russia-war-tipping-point Arestovych-Presidential adviser at the time, gives a casualty figure for the Ukrainians at that time of
1,000 casualties daily. That is the Ukraine government in June were admitting losses of 1,000 men per day.
They are currently on their 9th or 10th wave of conscription and there are countless videos on social media(twitter, telegram channels) of forced press ganging and summonses of people at work, restaurants. It is plain to see and has been for some time that Ukraine/NATO cannot defeat Russia.
Given all the begging of equipment and the emptying of the arsenals of former Soviet countries-what do you realistically believe their losses to be. The initial stocks of tanks, planes, Air defences, artillery pieces have been destroyed as well as all the old stuff they got and currently they are getting hammered and needing billions more dollars worth of Tanks, planes etc.
Where has all the initial stuff gone?
How do you imagine that Ukrainian losses are not magnitudes higher than Russia? There is zero dispute that the artillery duel is heavily stacked in Russia's favour(between 6 to 1 and 8 to 1). Their air force, navy and initial army destroyed. No objective serious analyst disputes this
It has reached a tipping point, David.
https://ussanews.com/2023/02/05/mossad-believes-157000-ukrainian-soldiers-are-kia-so-far-turkish-newspaper-claims/ The claims are in line with observed reality and the objective reporting since hostilities began.
Your source (ORYX) is a Bellingcat aligned funded by NATO propaganda source. Oryx is not an unbiased Open Source intel analyst. It is a paid and funded propaganda source masquerading as an independent OSINT analyst. It is not funded to give you a unbiased view of events. Oryx is just a Dutch Bellingcat and no informed person takes these people seriously. They aren't analysts-they are barely disguised propagandists.
It has reached the point where NATO either have to accept the Russian demands and reality on the ground or enter the war openly which leads to the same outcome-just a bit slower.