OK, I usually don't feed the trolls, but I feel without someone giving at least a bit of an answer, it will look like the OP is right.
Disclaimer - OP clearly has a lot of bitterness and anger, and nothing I write can answer or change any of that. I'm sorry for whatever made you feel that way.
First of all, and most of all - hakaras hatov. It may have changed, but the Mir is still the same yeshiva, and those of us who gained from it, owe the yeshiva a tremendous debt of gratitude that no money can ever repay. We also donate because we want to give back, we want to allow other talmidim to have the opportunity of yeshivas Mir - in whatever iteration it currently is.
So - I was in Mir back in R' Nosson Tzvi's days, and while he was alive, changes were made - some I was happy about, others I had more trouble understanding. I spoke to my rebbe at the time, and was able to better understand.
If I was at the point I was 20 years ago, applying to the Mir today, I would probably not get in.
However, the fact remains that the Mir has always been a yeshiva where things are more open, and people can grow at their own pace, from where they are, in their own way. Those of us who were around 15-20 years ago saw the changes when too many people took advantage of that, and the Mir started becoming a place where good bochurim didn't want to go. And so some changes HAD to be made, or the Mir and its legacy would be lost forever - because while they could care less about "top" bochurim, if the good bochurim aren't going there, no one else wants to go either, and the Mire would have lost its ability to give over what it does.
So they adapted, and brought a bit more oversight, but also more warmth. They made changes as needed, and with it more connection with rabbeim. If you're someone who wants to build a real connection with a rebbe, the Mir is unparalleled. The rabbeim will stay in touch with you, and will guide you through life years and years later, regardless of the size of your donations.
If you're looking for a rebbe who will treat you like a child and pretend there's a deep connection when you haven't invested a drop of effort into it, the Mir probably isn't for you.
Finally, despite the fact that the Mir is no longer as opened-doored as it was 20 years ago, it is still, without a doubt, the most diverse of all the mainstream yeshivish yeshivas.