How hard is it really to go past the first round (resume round) without networking?

Hey guys.

I have a question that might have been answered previously but I don't know where it is so I'll just ask it.
How hard is it to get past the first round (not the interview, resume round) without any networking for BBIBD Summer Analyst roles or for Boutique I-Banks like Moelis or Evercore, as someone in top 15 college with 3.7 GPA and relevant internship experiences? I'm asking this question because I heard that networking is usually for getting your resume passed.

Also, after the first round, how tough is the competition for me? I know that this may sound like a stupid question but what are the odds that a guy like me get a FOIBD role in BB or Botique IBanks? like 1 to 10? 1 to 5?

Thank you guys and good luck on your upcoming recruitment!