Affiliate Marketing Secrets

I just recently got a new job and I’ve only been working for 4 days now yesterday was the opening of the store. We had 3 days of training so the person that was doing the training wasn’t equip to train anyone so I took what I good from what she had to offer but now every time I make a mistake she screams at me loudly but if anyone else makes a mistake she politely explains to them what they did wrong and how to fix it.
I came from another store not affiliated with the store I’m now working but my last job I was the Asst. Manager I put all of this on my resume before they hired me and I was on my last job for 8 years.
I’m not coming to the store to take over I never even worked in a place like this before I just want to learn. I just want to be successful at what I do but this lady is trying to make it hard for me.
She have really bad customer service skills her training sucks I even had to give her a few suggestions and she use them but every time I do something it’s a big WRONG WRONG WRONG in front of customers, in front of crew members.
Please can someone tell me why is she doing this, how can I resolve this without losing my job, and sent me some positive energy to ease the tension in the store.
Thanks & Be Blessed