I'm guessing this flight school is more of a college program? I'm lucky because those subjects were natural for me. English type of classes I struggled in, hated, despised, and did what I had to do. My college that I went to would probably not require these per say, but if you had any lower grades, the process of elimination would probably knock you out of a slot of a student with better grades. Does this have anything to do with your skill as a pilot? NOPE, just the way it works. Just like having "XXXX" hours makes you a super pilot vs someone with just "X" hours(It ain't true!). Some things come more naturally to some vs others. Don't let it get you down, if its' something you love that much, nothing is going to stop you!

Good Luck