@otowa If you are going to hand paint this, I would at least apply the Mirror and Array. (For some variation along the handle!)
But be aware, that, at least when you apply the Mirror Modifier, you’ll need to make seams, otherwise it won’t unwrap cleanly anymore. (And by the looks of it the Array Modifier also gives some problems; check the settings before applying it, especially watch the Merge option!)
Check if all your Normals are consistent, I don’t know if that has any influence, but they need to be correct anyway.
Apply the Scale, if you haven’t already.
Check back in if you still get such a messy unwrap…
