Low hot water pressure at kitchen faucet
You may have sediment debris in the aerator or the valve assembly. Every few month we have to pull our aerators out and clean them. We have pretty hard water here. When you replace or turn off/on your shut off valves, you introduce debris into the system. Debris like built-up sediment, calcium, etc. This dislodges and makes its way to the tap, plugging small areas along the way.