I don't think there is an answer to your original sort-of-question. The reason "downplayers" (you mean passive players? Underbettors? I honestly haven't noticed that term before) take too much of your stack is because you haven't played enough poker to get a sense of who they are and how they play. By and large, if they're taking your stack, then they are better, more experienced players. That's what I'm saying you've got to face - there's no cure-all for this other than learning and practising.

The other reason people don't answer your questions is because half the time you seem to have the answers already, and if anyone challenges you you get holier than thou and refuse to listen.

One final thing:

And my BR.. eh I've been mentioning that since the very beginning, even when it plummeted down to $10. Everyone said I was stupid and was gonna blow it all, so yeah, I didn't.

You need to go back and learn not to be results-oriented. This is a level one, first-day-of-school leak, and you need to fix it in your attitude as well as in your apprach to poker.