How many rejections does it take to realize something’s wrong with my CV?

how many rejections does it take to realize there’s something wrong with myself or my CV? I’ve applied for about 20 positions so far with the same CV and cover letter which I just changed the company name.

International student on UK graduate visa with Mech Engineering degree and I haven’t got any interview offer at all for about 5months since graduation.

tbf, my grades weren’t great. I don’t have any internship done. The course itself was really painful personally which left no extra space to do extracurricular stuff, internships, etc.

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