I think I have two issues here 1. Stencils(such as number, icon...) are pixelized. 2. The manual paper texture on the yellow plastic shell is also pixelized because texture size and uv map are not matched.
Whats the resolutions of the texture export? There's sections of the decals that look really pixellated that might be a texture resolution export issue.
Even tho it may be too late now but the pull ring is waaay to small, looks like hair strand, while in ref image its almost half the grenade size.. well more of a 1/3 but you get my point :D Also the bit holding the ring is different shape from ref image.. In general there are some forms that differ from concept by a fair…