My textures on my terrain are just one-colour blurs

I have tried everything from googling other threads with this issue but nothing seems to fix it. I have tried disabling mipmaps on the textures, changed the texture type, messed with quality settings. I am building for Android but the issue stays even when I change the platform to PC. The textures are automatically applied with a script I wrote to use splatmaps so that steep angles are rock, below sea level is sand etc in case that makes any difference. The terrain is 10km x 10km from a 1081x1081 px heightmap - though I'm happy with the quality/resolution of the terrain itself, it's just the textures causing issues. I've tried messing around with all the resolution options in the terrain settings as well but that didn't seem to make any difference.
Any help would be appreciated, thanks

Here is what the game looks like


but here are the textures:

 

Have you tried playing around with the tiling settings when sampling your maps?

 

I was able to fix it by increasing the tile size

 

Cool, glad to hear that.