Let me make this easy for you: I do not think that Trump is necessarily "demanding that wapo fire anyone that wrote something he didn't like." Which is part of why I said, above, that this story is a weird fit for this thread title. What I do think is that Bezos has been trying very hard to suck up to Trump and part of that has been changing the tilt and tone of WaPo's editorial coverage, in particular, over the last year or more. There has been a lot of news coverage about Bezos's communication to the E-board about the policy changes, their reaction to it, and the wider media world's reaction to it, that i suspect you haven't missed (and if you have I don't know how).
I read the "Russian-friendly junta" article earlier, and yes, I do not think there is anything in the article that Trump would say is upsetting to him. It is pretty much a neutral description of Trump's approach to foreign policy. Read it yourself, and if you think differently, quote the passage in question.
I haven't read the other articles in detail, just skimmed a few. If you have and want to link the actual passages you contend express a negative opinion of Trump, please go ahead. Based just on titles. the "cover-up" one about Trump's hand seems the likeliest to convey a negative opinion - and Trump is very vain so he probably doesn't like the attention on that - but I haven't read it.