The source says, to repeat:

… the refusal of Ukraine to implement the provisions of Minsk 2 ….

What Russia did in response would be in Russia's statement. But here the writer is reporting that Ukraine refused to implement Minsk II.

If your link is only a translation of the agreement, it won't say anything about who violated it, so I'm unsure what good it does to comb through it. I don't see how the clauses are relevant without a factual chronology from after it's signing, such as the one in my link. I'll note that I'm happy to be presented with contrary evidence but also note that the source I provided is from Yale university—hardly a pro-Russian outlet.

Here's a Reuters link for anyone who doesn't want to open the PDF (I can't confirm they're both the same or if this one's as faithful translation): https://www.reuters.com/world/europe/what-are-minsk-agreements-ukraine-conflict-2021-12-06/