Watch the interview if you don't like the source.
Ukrainian negotiator David Arahamiya: https://europeanconservative.com/articles/news/official-john...
Video here: https://www.youtube.com/watch?v=6lt4E0DiJts
More than snippets
Perhaps it would be a good idea to switch to sites that don't have "conservative" in their URL.
And lo and behold, the fact of two guys stating a certain narrative about those events (then embellished up a bit by the publications quoting them) does not make it so. Even the article you're citing about Arahamiya's version of events isn't so clear-cut about the matter (it says Boris's advice was but one factor among many) as you're making it out to be.