Can a boxer with good technique be bad in the ring?

Learn to take punches. If you do not have the reach, you are going to take some shots. During training we would take turns doing rounds. One throws punches while the other keeps their hands up and takes punches (No dodging). Then switch, after a while you do not care about the hits. Also you will not be able to keep distance in a match, you must be more aggressive, cut off the ring and use the ropes to your advantage. Good luck and enjoy your boxing.