50NL: Isolating Limpers (General Thoughts)

[O.T.G.]

After playing about 3K hands of 50NL Full Ring today I am beginning to question whether isolating limpers is even worth it at such a low stake. I like to take the lead preflop when I play a hand so if there are 3 limpers and I am on the button with KJs, for example, I will usually raise it to $3. I hate limping behind and having to hit my hand in order to win money. However, after getting destroyed today by all of my out of position opponents I wondering if it is better to just play like a nit and wait for hands. Maybe I am being results oriented since my opponents were hitting the flop like 66% of the time instead of 33% today.

1. Should I still build these pots in position or should I start limping behind?
2. Should I only isolate 1 or 2 limpers and limp behind when there are 3 or more?
3. Would you limp behind with hands like 77 and 88 or would you raise it up?
4. Is it possible to keep losing money when you play almost all your pots in position and the majority of the time you also have the preflop betting lead (assuming good postflop play)?