Reaching a ceiling can be a signal to adjust how you are growing.
When something that used to work stops helping us move forward, it is easy to conclude that we have reached the end of our ability. That is not the only explanation. We may need a new skill, a different approach, more support, or a more realistic goal. I think it is worth examining the situation before turning it into a judgment about ourselves. An adjustment can be part of progress, even when it initially feels like being stuck.
Wisdom Window
What might need to change in your approach before you decide you cannot go further?