An ace is loud. Most tennis progress is not. It is the second serve that stops drifting long, the recovery step you remember, the point where you choose height over panic.
Make room for the tiny wins. They are the evidence that a practice session is becoming a game you can trust. A streak does not have to be ten aces in a row; it can be three good decisions made under pressure.
Keep a small scorecard for what improved. The mind believes what it can see.