So you've interviewed for the ones that have engineers from all over the world begging for a job and who's recruitment process suffers from the issues that come with scale, and from that you draw conclusions about the entire industry?

Also, you really think you're that good an actor interviewers can't figure out you're just testing the waters and aren't really motivated?

Since you also don't have a clue as to why you've been rejected, I suggest you're not very good picking up communication signals that aren't very explicit and verbal. Hell, that might actually be the reason why you get rejected in some cases.