I have a Barbie Pink Guava (approx. 6 feet)

that was doing
fine until couple of months ago, now the leaves are full of little holes, even
in the buds; I don't see any bugs in it with the exception of very few “little
leaf notcher” weevils that I control by hand.
I am attaching a picture of the leaves.
I have sprayed copper liquid 3 times in the last 2 months in case it is
a fungus but I don't see any improvement. I noticed that a near by Loquat is getting the
same. Your help would be appreciated. Thank you. (Broward County, FL)