Putin does not have enough forces to completely occupy and subjugate the entire country
Your too sucked in by the west's own propaganda. As a wiser than normal commentator said now that the convoy is moving we might find out what it is for in the next few days. Or maybe it really does have problems.
Migs - 2 military bases taken out well in the west of Ukraine. If stuff goes in by roads what do you think will happen to the roads?
Sanction - mostly the G7. What about the rest. Oligarchs wealth - mostly assets just like the bloke who owns Amazon. Seems they will have problems with boating holidays and property speculation in London. The assets are still in Russia also a lot of western ones. This one's page is worth a read. Our lot seem to think I have forgotten that he said sell Chelsea returns to charity. Now we must make sure he doesn't get his hands on anything from the sale.
https://en.wikipedia.org/wiki/Roman_Abramovich
Long war - well it hasn't reached the duration of some the west have been involved in of late - yet.
Putin and co can't work out what the effect of sanctions will be on the west and themselves?
Of interest
https://en.wikipedia.org/wiki/Ukrainian_oligarch