Are there any summer programs as acclaimed as COSMOS but for liberal art subjects like writing?

Recently I have been searching for summer programs but I am greatly frustrated. The reason is that I am well-rounded in general: I am decent in STEM, since I am in AP Calculus AB as a sophomore with an ok grade (B-), but I also like liberal arts like writing, journalism, and history. I am willing to apply for COSMOS, but I’m afraid that they will reject me because of that B- in calculus, and also my math teacher doesn’t really like me so I guess he wouldn’t write me a recommendation letter. Hence I try to look for summer programs like COSMOS, but in a liberal arts subject. Are there any programs like this? Please recommend me. Thank you!

COSMOS isn’t that prestigious. There are some good creative writing ones, like Iowa Young Writers’ Studio,