Sorry to hear that UrbanWild.

Over the years I have had to give up on growing many plants and bulbs because of problems with animals, pests and diseases, so I know how disappointing it can be. Lost many crocus too for various reasons, but never all of them.
Don't believe our native red squirrels dig bulbs so haven't tried it myself, but I think I read that someone on this forum had good success with using crushed oyster shells to protect bulbs from being dug, maybe its worth a try(on a very small scale). However, I do agree with Deb's comment, better to grow what thrives for you.
I think it is very valuable to have a good mix of species to spreads the risks around a bit. Better to add a few bulbs every year (even better to divide your own bulbs!!!) to see what really works. I still remember the disappointment I felt when buying Daffodils in larger quantities only to discover that I had a problem with the narcissus bulb fly

and almost all the bulbs were killed. Now I only have very few and the bulb fly needs to be hunted and the bulbs dug up or grown in pots and inspected for larvae every year. Needless to say I have very few daffodils now...
I had deer kill all of my tulips, but now have a good spray so grow them again... but will always remember that it might not work for ever.