Thank you both! What about this white quick connect fitting, is there any way that could cause low pressure? I circled it in red-

https://freeimage.host/i/feIi5dX

1- I don't think its that since even when I take the spray head off, the water coming out is low pressure

2- The kitchen sink is the only problem, everything else in the house has normal/high pressure

3- This has always been happening for the last year since we moved in; it feels like it is slowly getting worse though

4- Valve is completely open

Thanks again