Yes, I've heard the term "selection bias"; apparently one of us knows what it means, and you aren't the one.
I'm not "selecting" the cases I'm looking at. I'm looking at every case that has impacted me in any way, and suggesting that everyone else in the discussion do the same.
If that's a biased selection, then what you're really saying is "yes, class actions that affect people are crap, but that's not a fair sample" (apparently meaning that we have to include all the cases that don't affect anyone).
When I asked you for your view of what class action is, you responded in a way typical of those defending bad law: you gave me a technical description of the intent of the law, without reference to the reality of what the law does in practice. Laws and legal practices are not judged by their intent; they are judged by their effects.
You want your argument to matter, tie it to reality. So far all you've said is that we should ignore the fact that in most people's lives class action suits are nothing but an abuse, because in theory the law allows them to be used for other things.