Don't apologize. It's healthy to vent in low-stakes settings, and to recognize that you're emotional at the time.

I hope that you take another look at the job market. Sometimes you get knocked down through no fault of your own. The people who you are frustrated with have probably experienced that in different ways, but it's never pleasant.

You and your talents are valuable, and luck is a big part of life. Keep at it - comparing other peoples' successes or failures to your own is a hedonic treadmill.