pressure

[dalerenef]

the main line is 3/4″. the home is 8 yrs old. this lady moved in 3 months ago and this is how the water was when she moved in. i can’t imagine anyone living there with the water being like this! the water does come on a tiny bit stronger when first turned on, then another fixture makes all water slow. turn it off for about 10 seconds and it is almost normal untill another is turned on.?????
thank you all!