when I press my button I do the crouch animation and try to go under the spikes my character dies! Why is this happening? Is there anyway to fix that!?
So like a rig you have a humanoidroot part that part sits on your torso or uppertorso.
The reason you are still dieing when you play animation is because, you animated the character the rig the mesh part, so your character looks like it is crawling but the humanoidroot part the part that takes damage is still in its default position which is in the center where the torso is even though you don't see it that's because it is invisible.
And when animating, if you used the plugin that bright blue square that you click on the dummy to start animating that is the humanoidroot part that is hitting the spikes, which is why you die.
That is what happening.