Inground vinyl pool can’t locate the leak!

We decided to just wait until it stopped leaking and that’s where the leak would be right? Except it’s almost lost half of all the water in the pool!

The quotes we are getting are insane, we moved into the property 6 months ago and have already spent a good deal of money of fixing issues with this pool.

Should we just drain it and start from scratch? What do people do?

I’m clearly a pool novice..