Thank everyone for the comments. Relax and placement are the common feedback I got from high level players too. I will definitely focus on those next. My arm is doing ok now but my right knee starts feeling tired and weak, most likely from practice looping & probably being moved too much.
I played at Westchester tournament for the first time last weekend. My opponent in the u1000 final is a beginner too. His strokes are not as consistent nor powerful as mine but they look very good, like a well-trained players. Does anyone know what it is? Are his strokes more relaxed or his form or something else?
@dingyibvs : I played mostly defence in this video so it is a bit related to your questions. However, my op's loops are not very powerful so I let him attack. I made two successfull counters far from the table in the first set so that put a bit pressure on him too.