same here, the shot lacks spin and power - you can see the ball is barely lifting up and the lack of spin and power, the ball just drops over the net with very little arc.
Gozo, you need to generate some force from your right leg and spin the ball forward, not lifting it up.
going up, you are loosing too much energy in that shot.
and its not lifting the ball, but gripping the ball to spin it forward.
Unfortunately, modern table tennis, and to be honest ancient table tennis wasn't entirely dissimilar, just a bit easier because of the smaller ball, requires more use of the body to produce the speed of racket swings that encourage confident technique. So modifying technique to produce your own results always requires some compromises. As long as one focuses on what one can improve to get the ball on the table in their own matches, there is always room for improvement.
While tacky rubber gives you more time to hit the ball, the energy demands to get good ball separation is higher. Most modern rubbers are good enough to handle reasonable strokes. Equipment is not the limiting factor in good TT technique, it just adds some nuance here and there. The bulk of the performance is in the technique and this is true even when a coach tells you tacky rubber is better or worse for this and that. I have played at roughly the same level with multiple changes on both forehand and backhand with tack and non tacky rubber since my game is heavily thin brush oriented.
