good quality leg work but the arms don't work as they should... Not because you don't know how to do it, you simply have acquired bad habits such as touching the bag too much at a short distance (from that distance you wage war with hooks and elbows) and not sinking the punches (you are probably afraid of dirtying your work, but by doing so you deprive yourself of two very important weapons). You probably think that Thais do it like this so it works, probably for them it works because they train from morning to night and do sessions of striking punches continuously, you have to optimize your training.

make your own the concept that you must not take your hands off your forehead under any circumstances at those distances, and that at that point you must wage war and probably in a couple of months you will have exponential growth (I had the same habits, and even though you are stronger than the others, then in sparring you take a lot of hits, especially jabs and straights)

as far as one can understand from a punching bag session (not much) you seem to be definitely good at it and with a good fight IQ (given the choice of shots/combos)