Generally lawyers need to be involved to make sure any rejections are compliant. There's a whole cottage industry around this.

Personally, given the state of unemployment in the tech sector right now, I think it should be virtually impossible to fill a PERM right now because pretty much any position could be filled with a US LPR or citizen and the only reason it isn't is because the whole process is deliberately obfuscated or artificial barriers are put up purposefully to disqualify candidates.

I also think that doing layoffs in the US should disqualify you from doing any PERM or sponsoring any visa for 2-3 years.