It was very hard to tell if this user / "tester" was using ESET & MBAM correctly. As others have pointed out, running 3000+ malware at once is unrealistic. But also the av were giving him popups to make a selection unclear what tester was doing with those. I currently run ESET Premium, and I've had its LiveGuard feature pause and upload suspected malware to its cloud for analysis, and within a few minutes it comes back with its result. It seemed obvious that this tester was not keeping up with popups, and it was unclear if he was making proper selections. To me, it looked like the tester "broke" the computer, not the malware.
He was clueless as to which sample(s) caused infection. What he might have done, run the 3000 malware if that's his inclination. Take his time and figure out which sample(s) went undetected, if any, and then video a test with those undetected sample(s) to show what and perhaps how the samples went undetected. (my 2 cents)