I wonder if another way to word this, or express it, Dipti, is rather than to refer to this as a failure, is to reframe it ( NLP style) as clearly, that particular approach didn’t work. For now.
If you ever want to see determination at work, watch a hungry squirrel go after your VERY expensive, absolutely guaranteed squirrel proof bird feeder.
They don’t understand failure. It doesn’t register. While we like to think that we’re the only ones who register failure (animals do too), if you’re hungry enough, you’ll keep trying.