I am sure that you REALLY enjoyed making matcha in a bowl that you made yourself. Congratulations.
You WILL learn how to use glazes...... it just takes the same kind of investment in time and work that all of the other individual aspects of the pottery process take.
Clay is long. Life is short.
Once you understand a bit more of what is actually happening to those glaze materials when subjecto the heat energy, you will be more able to predict the kinds of results you get out of such combinations. I know at the moment it does not seem possible, but what you described (and got) is predictable.
But as was accurately mentioned...... test, test, test. Use "less than satisfactory" (ahem) pieces as glorified glaze test pieces....... so that your glaze application and understanding of glazing effects develops commensurate with your forming skills. Otehrwise the forming tends to get "ahead" of the glazing.
Then RUTHLESSLY critique the fired pieces after the glaze firing with a hammer. Learning to self-critique and edit your own work is an important part of the whole learning process.
Take that chawan and make a written list of the aspects that are working well both aesthetically as well as functionally. Then list the things that could be improved. Then take that list with you into the studio and make another one that keeps the successful aspects and adresses the less sucessful ones.