This is correct to some extant, and not just for getting education. As an example, in many competitive exams conducted by universities etc. to select students, the selection cutoff marks clearly show this pattern of intentional discriminatory admittance.

For someone belonging to "general" category, anyone designated to an upper caste, the cutoffs percentage for selection could be as high as 97-99%. For "reserved" category candidates, those from the lower castes, the cutoff can be as low as 10-20% for the same test. This means someone scoring 95% would not get get an admission offer while someone else scoring 15% would.

This reservation system is also a part of government jobs. I have seen "reserved" teaching positions being filled by candidates who score negative marks in the selection exams. But since no other type of candidate can fill the reserved position, the highest negative score gets the job.

Does this really alleviate the issues borne out of historical oppression of the lower cast, I don't know. Perhaps. Is this overall a good thing for a nation and its people? Again, I have no idea.