I checked the two links toward BBC articles:

One says children are fighting both sides (with Ukrain for some, for Russia for some others). It is terrible, but doesn't make a point favorable to any of the sides.

The other one claims that about 5% of ukrainian fighters are far-rightists ; which is few given the score of far-right in Europe, but doesn't make the country a fascist one. Actually, the article you give as source denies this russian claim against Ukrain.

I don't know which of the other links support your view, this two ones don't. Also, I don't know the other websites you use as sources, so I can't guess if they are reliable. I am too lazy to check them all, which of your links seems the most relevant to you?