he also believed his own propaganda like you do, and said Ukraine will win in May 2022, because USA and UK are backing Ukraine 
It did win. I consider pushing one of the biggest armies in the world back to where they came from a win. The war hasn't ended, but according to the Russians there was no war in the first place, so there's nothing to end, or is there?
It always makes me laugh when I remind myself that Russian TV channels were all screaming that there's no war just a little military operation that's going to end soon and months later they say Russia wants to negotiate with Ukraine but Ukraine refuses. Negotiate what? Take the remains of your special operation and GTFO to your side of the border!
Also, yes sure, Poland wants to share a border with the RF. What could go wrong?
As far as I know it does share a border with RF.
Please read carefully. It says (ironically) that surely they want to share it - which is what would happen if the RF annexes Ukraine. That would be a nightmare scenario for Poland, NATO the EU and possibly the US. Not that Ukraine having a border with the RF is something to be liked, particularly if it joins the European Union.
Joseph Borrel, maximun EU diplomat, has recently said that the EU can no longer be a "herbivore" when all the rest are "carnivores". Maintaining an army is costly and also carries political risks of various types if it is a large army. Western Europe is tired of wars and has reached (at least for now) the conclusion that it is much better to simply not go to war among them.
I am not sure the level of knowledge here, but the wars in Europe have been devastating. A million wars waged in the middle ages, the Napoleonic wars, WW I, WW II, even more recently the Balcan wars... these have achieved nothing but death and economic loses and decline respect to US, China and the rest of the world. It would seen that Putin has read the wrong history books during COVID, as he seems to have forgotten the basic principles: Everytime that an European country has grown too strong, all the rest have allied to stop it. Th RF, in this context, is no different (except that is not even particularly strong, just manically aggressive under the current regime).