At Eagle, when you finish probation they pretty much can't fire you without major red tape. So probation is where they weed you out if they think you'll become a liability. If you got into hot water for some mistake, I think they ask captains if you are a good person/pilot and check your probation reports.
One guy in my class got the boot during the probation checkride, but had it been just the bad sim ride then I think he would have been fine. He was pulling all kinds of minor things and it caught up with him.
I don't know what happened in your scenario, but I'm sorry it happened. I'm sure it'll all work out and you'll laugh about it in the future.