thats a bit odd. then again not all adivce works for everyone. Taking a break form TL helped me a bit. I may still be bad but at least I'm over the TL fatigue. If you want to brawl, try playing as one of your other characters. Though is you need to start practicing against low level CPU's, start with lvl 3 and pull out all the stops, then move up to lvl 7 and then to lvl 9, they arent official practice but think of it more as a simulation to test out things and keep a tone on your skill or even imrove it and build some confidense up. It helps me when I get soemthing down. Though like I said, if oyu need to break form smash for a while, so so.
most importantly, try not to stress about losing. No one here is gona rub it in your face. I'm used to losing alot and I still get a little worked up about it, but I end up coming back with a stronger desire to better with a little more confidense. Though If the case is that you are having a bad week, then just let roll off you and you'll see better days again.