For example he says Ukraine has been foreign controlled since the 14th century. A single counterexample makes the statement false.
For example, in the 20th century at the end of WW-I, before the USSR formed, at least for a while there was an independent Ukraine in at least a part of the territory that is now Ukraine. There was a government, they issued currency, etc. See here:
https://en.wikipedia...r_of_Independence
The Bolsheviks prevailed to be sure.
Another example is this shown in this "The Zaporozhye Cossacks Replying to the Sultan" painting of an 1675 (i.e. 17th century) event:
https://en.wikipedia...sch_Repin_009.jpg
Granted the painting was created 2 centuries later by a Russian of all things. The Cossacks were responding to the Sultan of the Ottoman empire. The amusing exchange of words is here:
https://en.wikipedia...orozhian_Cossacks
The Cossacks were in charge of the Southern part of Ukraine. That's why the Sultan addressed them. The Cossacks didn't make a deal with Russia until a century deal.