Welcome to the forum Bradley. I an not an expert at anything so take my advise with a grain of salt....lol
I Googled this and came up with this site which may help...
www.crabgrasslawn.com
Also, maybe your soil in that area is not very good, Does it get a decent amount of moisture in that area?
I Googled this and came up with this site which may help...

What Grass Grows in Shade? 5 Best Shade Tolerant Grass Species | CG Lawn
The best shade tolerant grass to choose from include St. Augustine grass and Zoysia (warm-season grass). Cool-season grass types for low light conditions would be Ryegrass, tall fescue and fine fescue. Instead of planting just one species, you could also choose to mix grass seed to get a sun and...

Also, maybe your soil in that area is not very good, Does it get a decent amount of moisture in that area?