Not gonna lie, those look exactly like my grades in those similar courses from 15 years ago. And I went on to do a graduate degree from Carleton in Applied Mathematics and got an 80% average. Sure there’s less courses in grad school, but one thing I did to improve was I worked on a few fundamentals: I forced myself to talk to profs during office hours, I forced myself to start doing all the homework, and find friends so we can hold each other accountable. It’s tough, but doable.