Kaleu,
For league TTRR, it doesn't matter how well you win, how good your time, you just want to win, and consistency is key for that.
Hints:
1. Practice non linear / semi-linear maps.
I learned on these maps - FFIE / Stratovarious / Herm / Krutgumman.
These maps help you see weaknesses fast.
You get good on the above maps, the linear (Nail, NinjaCamel, AZ01, etc.) maps become very easy.
2. Race your opponent, not yourself.
Know how good your opponent is.
Just beat them - don't try for your best run - that is for challenges / funners.
So easy to try a 45 on an AZ map and lose all your turns - your opponent might get a 55 and win - oops!
3. When you know your weaknesses, go back to basics or learn other styles to make it easier.
Can't climb? Extend - when you are on the rope, you can't fall. So many people "power climb" and fall - only do this when you are confident or RR'ing a good player.
Can't scroll? Don't bounce off the back wall, it generates speed and so many people fly their worm into the roof or slip and hit the floor - again only needed against a good player.
Practice the faster routines offline or in funners then slowly build them into your league games.
4. Avoid swooshes - if the wind if facing your worm, you slide down the wall and into the water.
As an alternative, you can extend down small drops and use the momentum to hit the back wall if you can control it.
For larger drops, just drop yourself, rather that swoosh over an arch.