"Uncle Vanya" by Chekhov - I think I couldn't understand it

Watched the version with Toby Jones,, Richard Armitage, etc. in it. And it's so weird. I know that there's something there -- a potent goldmine of emotions and questions and stuff -- but it just didn't "click". I was very underwhelmed and couldn't appreciate it even though everything -- the acting, the production, seemed very very great.

A few questions erupted in my mind. And I'd really appreciate if someone could help me:-

1. How could the professor sell the property when, as Vanya said, the property came as the dowry for his sister and thus should legally go to Sonya? The professor waves it off as "pedantic" but how come nobody says anything?
2. Is the estate actually sold? I didn't get a very clear answer for this from the play. And when I asked ChatGPT it says that, "according to the play, the estate is not sold" as if it's obvious. Am I missing something?
3. Why does Vanya's mother and the fat-man-with-the-guitar so blindly admire the Professor, even admonishing Vanya in critical times? They are so fucking spineless and sycophantic.
4. Is the entire play supposed to be something like an allegory against the monarchy? With all the peasants not revolting against the king and so on? Did Chekhov intend it to be so?

To praise or criticize a play you should at least understand it. But I couldn't even understand the play. Are there any tips that anyone has, so that I can at least understand, if not appreciate, these plays?

Thanks!