IF...
1. You really wanted to be an alpha tester.
AND
2. You weren't chosen.
AND
3. You feel okay with this because "you know it will be bug-ridden", "testers are not there to enjoy the game".
You should know that complacency is typically an irrational response in these situations, because you're writhing in cognitive dissonance. It's just making excuses and rationalizing.
Because I'm aware of the psychology behind this typical behaviour, I know that it's okay to be upset.
[This has nothing to do with the fact that SE decides who gets in, according to whatever criteria (or lack therof) they determine, regardless of who we are or what we think. This is actually a valid argument]