Diagnosing low faucet flow: Single faucet
Do you have a screen, in the tap (faucet) at the end where water comes out into the sink?  (or the line that collects hard lime, water deposits?) This can be a problem anytime the water is hard, THUS quite mineralized. Those bits- often the size of sand grains -- can collect and wreak havoc. Clogging of water lines if galvanized via mineral build up before getting to the faucet in the supply lines can be an issue also. I have seen this in laundry lines where mixed water is a problem when washers do not rinse well - their lines are messed up with sand, pet hair and other clothing debris that does not rinse out of the filter properly and collects to clog everything up, one must check the washers as well as the mesh screens at ends of supply lines so all water goes where it should without a hitch - or leave linty residue on clothing because of the clogs involved.