There are some threads on here that I wish I never read..............
Like the OP, I have organised, and re-organised my photos over a number of years.
I think they are now more or less under control.........
But, using just ccleaner, the number of duplicates is scary. Luckily, I have a very big hard drive. So it is and remains a manana or avrio job to sort them out.
(Avrio means manana but without the sense of urgency)