This is a synopsis from Sir Lawrence Freedman, professor of war studies, Kings College, London:
(I am going to have to paraphrase him)
Russia has a formidable army, but it hasn't been deployed very effectively, and they've underestimated the resistance they would face.
> This is partly due to hubris and arrogance of Russian political leadership ( not necessarily the field commanders)
Russia had plenty of time to plan a blitz offensive, where their major objectives would be met in 24 to 36 hours.
> But at this time, Russia has lost the initiative, and does not hold one single major Ukrainian city.
Ukraine will be a difficult country to occupy; it is the size of France and has 40 million people.
Even if the Ukranian Army is seriously degraded, an insurgency can be maintained, because Ukraine has a long, porous western border with European countries through which arms can be provisioned
Putin's offer of negotiations is a ruse. No commander agrees to a ceasefire until their soldiers are in optimum positions. Russian troops are bogged down and do not hold any major cities yet.

(I am going to have to paraphrase him)
Russia has a formidable army, but it hasn't been deployed very effectively, and they've underestimated the resistance they would face.
> This is partly due to hubris and arrogance of Russian political leadership ( not necessarily the field commanders)
Russia had plenty of time to plan a blitz offensive, where their major objectives would be met in 24 to 36 hours.
> But at this time, Russia has lost the initiative, and does not hold one single major Ukrainian city.
Ukraine will be a difficult country to occupy; it is the size of France and has 40 million people.
Even if the Ukranian Army is seriously degraded, an insurgency can be maintained, because Ukraine has a long, porous western border with European countries through which arms can be provisioned
Putin's offer of negotiations is a ruse. No commander agrees to a ceasefire until their soldiers are in optimum positions. Russian troops are bogged down and do not hold any major cities yet.
