Feel incompetent and incapable, any success stories?

Long story short I lateraled to a new firm from a coverage group where I built slides all day to a top-performing product group which is way more interesting, the work is better suited to me, and I love modeling. I remember being a hardo back in college and I lost that as soon as I started in coverage. Now modeling again I feel like I found that spark again.
That comes with sacrifices as I am getting torn a new asshole every day. Group culture isn't the best, people are not nice/courteous at all, work is always expected to be perfect, and unlike my old firm, there's no senior analyst to protect me. Now its me and the associates who always expect my work to be completely spotless despite me having no modeling experience. 
My naivety is not an excuse there is a lot of mistakes I make that can be corrected and are really due to lack of attention to detail. I always feel like an absolute idiot when my associate asks me why I missed a formula in a specific cell. I know I should have checked it but I can't.
Either way not here to rant but would love to hear anyone's stories of starting out like shit and salvaging your rep at the firm/learning from your mistakes. Just want to know I'm not alone. Being the only lateral analyst at this firm doesn't help as everyone else started out doing this and are obviously much better.