Your analysis merely regurgitates Ukrainian propaganda claims. Evidence?
Looked at from any rational point of view it is clear that Ukraine is suffering massive casualties and losses in armour/artillery systems. The fuhrer of NATO makes it clear that it does not currently have the capacity to produced enough ammunition for Ukraine.
If you believe that Ukraine with a less than a third of the population of Russia and a decimated economy is going to defeat Russia which has over 10,00 tanks and hundreds of warplanes and more importantly a large industrial base for weapons production then you are not being honest with yourself.