You asked, “, but will my B+s and C+ on the semester final take me out of the running completely?”
We pointed out these are pre high school. “tippy top adcoms aren’t interested in middle school.” True, you took “hs classes.” But many won’t even skim 7th and 8th.
The more you know about what they value and look for, the better your path through hs can be. And then: your apps.
And academic improvement is more touted on CC, than by adcoms at tippy tops, with the fierce competition. Your real record begins this fall.