Think of it like this. I am also applying to similar caliber schools as you, and have done a lot of research, so I am only trying to give you a dose of reality.
In the class of 2023, the total number of applicants was 36,843. Out of that, 2,178 students were selected (5.91% acceptance). Out of the 36,843 students who applied, tens of thousands of students had leadership roles, tens of thousands of students were in multiple clubs, thousands of students had a higher GPA and ACT than you. Thousands of students had more impressive extracurriculars. Thousands of students had a stronger profile in general.
Guess what? The vast majority of them were STILL rejected, despite having an incredibly strong profile (stronger than yours). I don’t say this to be rude, but to give you, again, a dose of reality, as you seem to severely underestimate the competitiveness of yale admissions.
EVEN if you had a 4.0 GPA, 36 ACT, and 10 clubs, you would still have a very good chance of being rejected. There are just too many qualified applicants applying.
That said, do you really think doing two more clubs will separate you from the rest of the pool?
For the majority of students, you have a stellar application. What these commentors are trying to tell you, however, is that when compared to people applying to YALE, your profile is average. Average is not good, and there is an extremely high chance of rejection. If your counselor really said that you would get in, she is incompetent.
How do you stand out then? If you don’t have a national or international award, started an extremely successful business, or anything else of that caliber (which you don’t have), you don’t stand out.
Considering your 3.8 GPA, which is significantly lower than the average admitted Yale student, and your average-strong ACT compared to Yale admits, you are just like everyone else, or maybe slightly below, as you don’t explain much about your extracurriculars.
NOTE: Look at my profile, and look at the first thread I posted. Look at how much more detail I give in my activities. If you did that, experienced posters would be able to give you a better estimate.