You have better things to do with your time and energy. Squirrels are like children. A certain amount of picking up stripped corncobs, tidying the mulch, and damaged or lost bulbs is inevitable. It's not personal. All circumstantial evidence to the contrary, squirrels are not the slightest bit interested in ruining your spring color scheme.
Food is a squirrel's best friend.
Your garden is just the local smorgasbord. If their munching is getting expensive or traumatic, diversionary tactics are in order. Dried field corn, sunflower seeds, and other nuts will do the trick. Better yet, find a retired neighbor with no interest in gardening and offer to go halves on squirrel food. This is actually a pretty great solution.