I think it's fair that universities accept some minorities even when they have lower grades compared to others because it's probably harder for some of them to get better grades. If you look at the statistic for median income based on race, non-asian minorities have ranked the lowest for decades so they probably don't have the same resources as non-minorities to get better grades because they can't afford them. So by accepting more minorities these universities can help them get higher education and eventually allow them to even the scale and once that happens race should be taken out of the equation for college acceptance.

Statistic I'm referring to: https://www.census.gov/content/dam/Census/library/visualizations/2018/demo/p60-263/figure1.pdf

But don't get me wrong, I sympathize with OP. I'm an Asian-american and we normally get higher standards for college acceptance as well. But I come from a low income household and only did well in school because I had intrinsic motivation and busted my ass to get a 5.1 GPA in high school but I had to do so with very little help so I understand the struggle someone from a similar situation can go through and that's why I think it's fair that college accept minorities with lower grades.