I work with live tardigrades under a microscope and you could easily squish them with a little metal pick, or by pressing on the glass coverslip.
Tardigrades are very different from amoeba. They have a well-defined cuticle exoskeleton surrounding a liquid space, about 1000 cells, while an amoeba is single cell and highly deformable.
I suspect if you really tried to deposit a pile of tardigrades on your finger and squeezed really tight you could probably damage them with the ridges of your fingerprints. I don't know enough about the biophysics of finger pressure and how the surfaces interact, and I wouldn't really want to do this (feels cruel, even if they have very limited nervous systems).
Tardigrades are very different from amoeba. They have a well-defined cuticle exoskeleton surrounding a liquid space, about 1000 cells, while an amoeba is single cell and highly deformable.