About to lose my mind...

I'm just so frustrated!!! My baby is a good baby, at times can be a handful but aren't they all??? I'm so fed up with my MIL!! My SO and I both work full time so sometimes she will watch her in the afternoon until he gets off work but it's usually only a few hours and never more than twice a week. Other than that she doesn't really see her much, but when she does and if my baby cries she instantly starts saying how she's a cry baby and spoiled, I'm ready to flip. I think to myself of course they're going to cry, and she hardly ever cries tears she jus wines. Ever since she was about a month old she jus wants to be on the go, having a hard time getting her to sit play longer than 5-10 minutes interested in a toy but than again isn't that what babies do, and they're going to cry. If they could talk and tell us what's wrong then that would be wonderful but they can't lol idk I'm jus so aggravated, I'd think if you didn't get to see your granddaughter that much then when you did you would be happy about it and my SO's father jus passed away over the summer so I'd think she would want to spend even more time with all of her grand kids. My SO has 3 other children with his ex and the youngest is 9. My MIL and I didn't exactly get along the greatest before finding out I was pregnant. I jus don't know what to think, If I hear those words one more time I might jus flip out on her and then she won't have to hear the crying anymore. I don't even ask her to watch her, it's my SO, and it is convenient too because she lives jus 2 streets up from us.... ahh!! Idk, my mother passed away 2 years ago And she's her only grandma... I kinda feel like she takes it out that way because she doesn't like me 😕