(1) Although TV holdem is exiting to watch, its probably not good to develop strategies from. They tend to only show you the exciting hands and you might get baised towards loose/aggressive playing.
I would definetly agree, What the TV shows you is players going all in, or beeting with 7-2 they never show you how the players built up their stack by winning small pots and not getting trapped.

But aside from that it might just be a bad luck streak that gives you less confidence, I find that if im playing good or at least winnning at the time I tend to think my cards are usually good, for example if im playing good i will usually call a big bet with top pair and a bad kicker. For some reason I seem to win a lot more this way even though it might not be a good strategy. Anyway what I'm getting at is that when I'm losing I find its usually because I fold to many hands that I would have won and get bluffed out of pots easily.