That's to be expected. A 4.0 GPA is not an asset in seduction on a college campus. It's also not an asset in high school either. I'll focus my response on what can be expected on a college campus in the USA.
In undergraduate programs, the guys on college campuses that get laid the most sustainably are guys with 2.5 - 3.5 GPAs in business or a social science discipline.
These are guys who are doing well enough in school to continue going to school and have majors that put them into regular contact with women.
Men with sub 2.0 GPAs are at risk of not graduating. A guy with a sub 2.0 GPA might be a good short term seducer due to a party lifestyle but academic issues could keep him from not finishing all 4 years. Having a GPA above 2.0 helps in staying on campus long enough to socialize and keep meeting women.
STEM majors who well in STEM classes are the types of men who are going to be unrelatable to a lot of women.
STEM majors have less access to women because there are fewer women in their classes. The most attractive women on campus are not going to be STEM majors either. The few women in STEM majors are socially odd and not very good looking. In fact, most will have subpar looks. Thirsty STEM guys will try to shoot their shot on these mediocre to subpar looking women just based on proximity. They will also have hobbies/interests unrelatable to the majority of women on campus either. They will also be bookwormish and spending a lot of time in academic pursuits.
Lower GPA STEM majors aren't going to be much better. They'll have the same access issues and possibly the same hobbies/interests issue. They might spend less time studying and be slightly more socially well rounded.
Business and social science major males are more interested in going to the gym/exercises, they tend to have better social skills if they have lower GPAs and aren't too studious, and they have access to enough women in classes. They also tend to have more relatable hobbies. Some of these guys are also in top tier fraternities on campus.
We have an excellent college sex thread too.
I thought I'd share this as someone who went to a party school and was in a fraternity there as well. Not wanting to give too much about myself but I went to UGA and graduated a few years ago. While Athens has its hot girls, I do feel like the quality got worse every year due to the admission...
www.sosuave.net
The rules are a little bit different in graduate level programs than what I described in undergraduate. Graduate level students are more likely to be in serious relationships and many are even engaged/married.