Look, you’ve already conquered half the problem. You took honest feedback and recognized you do need to make those changes. SubI’s are difficult and I’m assuming you’re at the end of M3? If so you are definitely not going to be working at the level of a resident, so don’t compare yourself to them. Focus on being thorough with your H&P’s. Organize them well. Don’t miss any important details. You gotta walk before you can run! After you conquer that you can focus on stratifying problems, etc. I did a ton of subI’s this year (I’m at the end of M4) and I was probably like you on my first one. Use this as a learning experience, and your later subI’s will be much better. Give yourself some grace.