LOW GPA FOR MASTER PROGRAM (Mathematics)

[BANGtheory]

Long story short, I firstly went to community college and transferred to my undergrad institution. I took upper division math during my undergrad. I got a bunch C's in real analysis and abstract algebra courses because I was lazy and mathematical immature at the time. (Dealing with relationship). And I think these main courses really hurt me. I raised my GPA from 2.7 to 3.0 in my last two quarter because I got almost all A in my last two quarter, 3 math classes and 2 management courses(non-math). The courses that I got A or A+ include PDE, Complex analysis, numerical  analysis, numerical linear programing and nonlinear approximation in numerical analysis. My interests are numerical analysis, combinatorial  game theory and analysis. I graduated with B.S. in mathematics with only 3.03  from a top 20 mathematics program (graduate ranking) in the U.S with no research experiences. And my GPA is relatively low compared with some students. I want to know if I have good chance applying to some mid-tier master program such as USC, UCI etc.... Any recommendations would help me. I am kinda stressed out because I barely hit the minimum of applying to graduate school.

Edited December 21, 2018 by BANGtheory
I mentioned my school is top 20 in mathematics because some of my classmates had better academic performance than me, and my professors usually have grade distribution on 2.3-2.6 GPA range. Does the school I attend matter?