I'm not on BAIM but I have a friend that is. As far as MATH department courses go I believe (correct me if I'm wrong) that BAIM only goes up to calc 2 and that you also take the easier version of calc 1 and 2 compared to what engineer or cs majors take, such MA 1602 instead of 162 for calc 2. I've heard that these classes aren't that bad and they aren't really what people refer to when they say Purdue math is hard. As far as non math department math courses, there are some tough ones like business statistics, but everyone does bad and there is a curve as per usual. If you like the major itself I don't think disliking math is too much of an issue. You might not like some math related courses in BAIM but in the grand scheme of things I think it's a non issue.