You may wanna look up how the strength disparity looked at the beginning of the war
Not gonna respond to each of your claims point by point... but this one deserves some attention.
Ukraine, circa 2021, had the second largest army in Europe. The largest military on the continent was of course Russia's.
During the times of the Cold War, the most capable Soviet divisions were based in Germany and the Czech Republic. Within the Soviet Union itself, the absolute majority of "front line" units were based in Ukraine and Belarus. This is reflected in the disproportionate amount of armor, artillery, and aircraft that Ukraine inherited after the dissolution of the USSR.
This article from 2016, provides the following comparisons for certain key items:
"Ukraine, for example, currently operates more than 2,800 tanks-compared with 423 in France, 407 in the U.K., and 408 in Germany.
And Ukraine's arsenal comprises 625 multiple launch rocket systems-compared with 44 in France, 42 in the U.K., and Germany's 50."
Source: realcleardefense.com/articles/2016/12/12/largest_land_armies_in_europe_on_the_edge_of_war_110473.amp.html
That's just tanks and rocket artillery. But they also had a monstrous amount of armored personnel carriers - 8,219 according to a pre-war link.
The tank and afv figures represent a roughly 2:3 proportion to what Russia possessed.
In addition to this, Ukraine had an air force of approximately 500 planes of all types - including at least 50 jet fighters, and more than a hundred assault and transport helicopters.
Two of Ukraine's ammunition depots (Cobasna and Balakleya), were Europe's largest and second largest depots respectively. They have a dozen others besides these. Containing tens of thousands of tons of ammunition, intended for a Soviet war with the West.
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So Ukraine was stuffed full of weapons and ammunition, hosted elite assault formations intended to fight NATO armies, and even received strategic bombers and submarines from the USSR (the bombers were bought back by Russia in the late 90s).
What was Russia's situation then? Russia, in Soviet times, hosted a mass of reserve formations. A pretty typical strength level was 30-40% of nominal strength. Only to be filled out during a mass mobilization in the event of a "big war". The oldest and least usable equipment was stockpiled in Russia.
Coming into 1991, Russia had a military that was not substantially better than Ukraine's in its land component. Remember, that circa 1991 Ukraine started with an authorized force of 800,000 men. Only after many years of cuts did it go below 200K.
The gap with Ukraine widened between 1991 and 2022. They were busy selling every piece of working equipment to places like Pakistan and Thailand, while producing exactly zero new kit. Russia also sold a lot of its stockpiles abroad, but unlike Ukraine it actually continued production of the most critical items - preserving the technical cadres and supply chains in the process.
However, even given a thirty year opportunity to gain a serious quantitative and qualitative advantage over Ukraine - Russia didn't make all that much progress. Unlike the Ukrainians, we have a navy and a strategic nuclear deterrent to maintain - and these demand astronomic amounts of money. Within the ground forces, that bear most of the burden of this war - the thirty years of "opportunity" provided maybe:
1) Several hundred T-90 tanks of all modifications. Compare to total fleet size of 3,000+ tanks. So we can see - most tanks were Soviet, and just as old as Ukraine's.
2) Again several hundred BTR-82A armored personnel carriers, and several hundred modernized BMP-3 infantry fighting vehicles.
3) Several thousand new armored cars, and MRAP type vehicles.
Appreciating the enormous size of Ukraine's military, is part of the process of coming to appreciate why Russia may pose a threat to Europe. Personally I am skeptical of this idea of Russia invading further west, but this important context is one of the things that does give me pause.
Even after its billion dollar orders to Korea and America, it would take Poland many-many years to approach a level of Ukraine's militarization in 2022. Most Polish persons and other interested parties are not aware of this simple fact.
Instead everybody sees themselves as the "key player" who saved poor little Ukraine. The reality is that even a large country like Poland could cover at most 5% of Ukraine's needs without hollowing itself out.