You do have a point: they didnt succeed in creating all 21 amino acids.

Given that the first life forms may have been very different from modern cells, you have absolutely no way of knowing that they in fact had all these 21 amino acids. In fact, the idea that the very first lifeforms were cells is certainly wrong; the they were likely not even as complex as viruses.

Even assuming that all 21 amino acids were absolutely needed for any kind of life to arise, so what? The experiment only lasted a short while, whereas Earth had a millions of years.

Therefore your conclusion that this experiment disproves abiogenesis is grossly false. Ask any biochemist and I guarentee they will tell you more or less the same thing.