With all respect to SIM degree holders, but I think that as long as you're not from local unis/reputable unis from overseas, your chances of joining any form of MNCs or big local firms is as good as zero. There will be special cases but yeah you get the idea.

It's evident from the JD of most jobs esp for graduate programmes. In that case, you even need a minimum of 2nd upper from local unis to be qualified for it.

The fact is that in every top/popular jobs, there will be tons of applications from all the reputable unis and private or SIM degree holders will be in a disadvantage position for sure.

Rather than trying to aim for top companies, make do with a reasonable coy and gain valuable experience. Don't fall for the trap of aiming too high and be jobless for extended period.