Now that the dust has settled, I think it might be useful to mention a few points. To those who got an invite, congratulations on getting through! But remember, this is just another step, you still need to do well in your interview. Remember that roughly half of interviewees are dinged! And even with a good interview, your whole app is re-evaluated when final decisions are made. So prepare, prepare, prepare!
To those who didn't get an invite and are wondering what went wrong, here's what I can tell you from my own experience.
On the matter of feedback, its pointless requesting individual feedback because no school would provide it. For Ross, over 2000 applicants are rejected a year, to provide feedback for each applicant would be an enormous ask, to provide feedback for you alone would be special treatment.
The difficulty now is learning from the black box of rejection. There are many reasons why you might be rejected or waitlisted. You may have had a stellar profile, but adcoms don't see your 'profile', they see your execution and your narrative. Maybe something came up in an essay that drew concern. Maybe your recommenders weren't specific enough, maybe their recommendation threw up an issue, maybe they didn't mention enough of what Ross was looking for. Maybe your work experience wasn't very impactful, maybe you didn't do enough outside of work to show your well-roundedness. Or maybe it was simply that you had a good story, but there were too many applicants with great stories in your candidate pool. You can do everything to put yourself in the best light possible, but all it takes is someone who is a little bit better in each area and they get the invite and you don't. Low key it could also be that the adcom didn't see the school as a good fight for you - and honestly, they would be doing you a favour.
My advice here is be humble, and learn from it. If you have other school applications in progress, focus on those and treasure any opportunity you get. Don't blame Ross, think that they made a mistake, and brazenly move on. Go through your application again, and see where you could have made improvements - better yet, seek advice from others. If you know anyone in the process as well, ask them to take a look at your app and let you know if they spot any red flags.
This feeling sucks now, and I'm sorry you have to bear it. But better things are to come if you take the time to learn and introspect.