Someone aggressively expects something of you that isn't reasonable to expect of you.
This throws off your ability to determine how much you should expect of yourself. When you expect too much of yourself, you're unable to recognize it because you're expecting less than other people are and with less aggression.
Being unable to recognize when you're expecting too much of yourself and therefore unable to stop yourself, you end up getting into the habit of expecting too much of yourself.
People expecting too much of you leads to you expecting too much of yourself, even if you don't value their opinion at all.
You then catch yourself having the habit of expecting too much of yourself. You decide that you want to break the habit. Anytime you catch yourself expecting something that you frequently overexpect of yourself, you put an immediate stop to it.
But then, you end up depriving yourself. You used to enjoy doing it every once in a while when you randomly felt up to it. And now, you've had to stop yourself to prevent expecting too much of yourself.