How to follow up with a master's advisor who abandoned me? I was recently awarded my master's degree. This was a very difficult process since my master's thesis advisor completely abandoned me halfway through. She literally did not answer my e-mails . No -one in my institute was specialized in the branch I wanted to write thesis so , I wrote to a professor of another institute in my country and she agreed . I visited her institute for 7 days in January , 2020 and she gave me a research paper to study . After completely understanding the paper in mid February , when I emailed her on how I should proceed she didn't replied .  I e-mailed her 4-5 times in February-March and got no reply.I ended up finishing the work on my own and the committee approved my thesis without her involvement.( but didn't evaluated thesis of any student due to pendamic( thesis were not even asked for submission, the evaluation was done on the basis of presentation done in mid february) More details in my previous post.
My concern is that no one has reviewed my thesis. One other professor gave very generic comments (grammar) and simply said I wrote a nice thesis. I want to apply to PhD positions in Europe, so I think my thesis should be carefully reviewed by an expert before I apply.
Question: How can I get my (former) advisor to review my thesis?   . Should I write in email that a this was not expected  as she had said yes to me and even I visited her institute  and  I was left for thesis without any advisor?
Or there should not be any complaints in e-mail and I should just request her ?
Do writing these things and expressing my displeasure will further diminish chances of her replying to my e-mail . But certainly due to her I went through very much anxiety and had to spend a lot more of time on project by myself ( and whose output is till not known although I tried to give my best ). I am sure she was not suffering through covid-19 and I saw her name as one of the speakers at  various seminars taking place in my country amid pandemic( at different points of time).
She didn't replied. It is a weird thing how professors wield such great power in Academia that students can't do anything.
This is a peculiar situation. Your supervisor did not honor your agreement, but at this point she has nothing to gain from continuing to be involved with your thesis, and being angry about that isn't going to help you in any way. Realistically, do not expect any more input from her, and move on.
Getting someone else to look at your thesis could be useful, but keep in mind that you are asking someone to put in a couple days of work for nothing in return. Try to find someone who could be at least slightly interested in this, and see what you can do to minimize the effort for them. Maybe approach a lecturer whose class you took during your degree, or enroll in a new course if you think that you have burned bridges in that university? Search around if there is some other researcher, even elsewhere in the world, who has published on a similar topic -- in particular, someone early in their career might be more excited to help.
Even then, clean up the writing as much as you can by yourself, maybe send them just the key proofs, and ask targeted questions -- in other words, approach this always keeping in mind that you are asking for a favor -- and you are more likely to get a reply.