I agree with some of what has already been said. One, the letter, even after suggested revisions, is still WAY too long.
Two, losing a grandparent might explain difficulty in one semester, but you have had difficulty in three semesters. I understand it is tough to lose a family member (I, too, lost my grandmother during college-she also died of lung cancer in a suburb of San Fran, coincidentally). But lots of college kids lose grandparents during their college years and manage to pass their classes, even if they don’t do as well as they might have otherwise. I don’t understand how that excuses you basically giving up on your class after missing the mid term. You could have turned it around.
You may need a break to gather your resources and come up with a plan to finish your education. There may well be a better school for that. There is no shame in stepping back and taking a break. None at ALL.
Good luck going forward.