Haha, all you can do is laugh. It is pretty bad
BUT- it will grow back, promise!! Here's a video on how to scissor cut a mane that might help you clean it up
My horses live outside in New England winter, so they often have neck covers on, which rubs out big chunks of mane. After the winter, I generally have to cut it back pretty far in an attempt to even out what's left with the rubbed out stubble. I don't quite roach it, but I have to cut it back really short, which is sad when you have Morgans that typically have lush, thick manes. If you're using scissors (which I do), you're going to need to hold them at an angle and sort of cut up into the mane to try to make it look a little more natural. The hardest thing for me to grasp was that although the mane looks
like it's a uniform length along their neck, remember their neck has a curve/arch to it and you can't just cut straight across as the neck isn't a flat board.
Here's an example- Isabel could
have a really long, thick mane
But scissoring it leaves it more like this, which is definitely not pretty, but manageable. And, all summer, it grows longer!
Here's my other one-when I have to bring hers up short (not technically roached, just really short) it stands up sort of spiky for awhile until it's long enough to lay down on her neck again. Fresh cut last summer:
Recent (and looking scraggly after a long winter):
It WILL grow back, don't fret about it. Watch that video and then work on evening it out, and it will look much better.