Russia and Ukraine

[Deesse23]

When you invade another country, with an overwhelming number of hardware, including T90s ´n stuff, then get pushed back, several times (Kiev, Izium), ending in a rout, then things are not looking good for you. Then things didnt go according to plan
Period

Antitank weapons? How comes that a substantial amount of Ukraines newly aquired MBTs are former russian tanks? Because "anti tank weapons"? Hardly.

If you are referring to WWII tactics and usage of manpower, then you are horribly wrong.
You are basing your opinion on false historic comparisons and pop culture, not on facts.

There is public information around, pretty hard data, that is (and i am talking neither about Ukrainina nor Russian Ministry of Defense) painting a picture not favourable for Russia. It has a severe problem with quantity and quality of manpower, and you cant conquer a foreign country with tanks. You need crew for those tanks ( n stuff). Looking at the curent standing of calling in the reservists, this doesn tlook good either.

I am a layperson, and, speaking as a layperson, I think that Ukraine has lasted as long as it has due to Western weapons, and, especially, Western intelligence.

Yes and as such, you are ill/mal informed. Please get yourself informed and form an informed opinion.

Example: 
There is visual confirmation of Russia having lost about 1200 Tanks. 400 of those were captured by Ukrainian forces. Thats 33%. Do you think that speaks more of the effect of western anti tank weapons or rather something else?
300 additional Tanks have been supplied by the west. Do you think external (=western) tank supply of Ukraine is Russias biggest "tank-problem", or something else?
By the way, the numbers for IFV and other stuff are in the same ballpark.