Reasonable question, and one being asked in a bunch of capitals!
Ukraine didn't have much time to prep and Russian forces haven't had a lot of success. NATO has been prepping for 75 years.
Regarding equipment advantages, every encounter between U.S. (or French and EU equipment) and Russian equipment has been a disaster for those using Russian gear.
NATO forces have a huge advantage in training, and successful employment in combat. French and other NATO forces have a great deal of relatively recent combat experience. U.S. capabilities are off the scale in every conceivable area of comparison. Way back in 1986, I designed the air-to-air training program for all of the west coast Navy fighter squadrons when I was in charge of the FFARP program in VF-126.
The training and equipment now are so far ahead of what we did back then that my program is now kindergarten level, on the short bus! Interoperability, instantaneous combat data sharing, flexibility, personnel quality - really, everything - is now so advanced that Russian forces (people, gear and doctrine) are hopelessly outmatched.
Even standing alone, Poland would slaughter Russian forces. They've been prepping since 2014 and are leading the Europeans in military spending, having committed to 4% of GDP recently. Poland also has a huge amount of information on how Russia might deploy because they were part of the Warsaw Pact.
Russia has a huge (as does China) demographics issue. No kids = no young men available to march into meat grinders and it won't be long before the force structure collapses.
My big concern is that everyone gets backed into a corner and someone pushes the button on a nuke. Has anyone seen the old movie, "The Bedford Incident"? Worth a watch!