The US military could have taken Ukraine in 1 day without losing a ship. Russia got stuck in the mud.
You misunderstand Russia. Russia is doing it slowly because Ukraine is their neighbor. If the US tried to take Ukraine, they would run into the same problems Russia has. In addition, the US taking Ukraine over is exactly the thing that Russia doesn't want. The whole picture isn't as simple as you make it sound.
If you are simply talking about strength vs. strength, you might be closer to right. But it's hard to tell because of all the US and European help Ukraine has received.
That is the dumbest thing I have ever heard and factually incorrect. Ruzzia DID TRY to take all Ukraine in a few days. Ruzzia sent colunms of troops towards Kiev (people still remember the Butcha war crimes and massive civilian deaths, we have not forgotten psicotic BA), demanded and inconditional surrender and took by treason a large part of the South of Ukraine.
Ruzzia is trying with all its might, only short of using nukes, which would be stupid as they are by the side of Ukraine and NATO would easily interpret any radiation heading to Poland as an attack.
The truth is far more simple - what is happening is exactly what it looks like: Ruzzia does not have the capability to advance or cause a decissive loss to Ukraine. They can and do use terror - you do not need a big army for that.