Water is slow going down put in Mr. Plumber liquid several times and soesn't seem to help

The first thing you should do is pull the stopper and shine a light down the drain. You will see a small rod down there. Hair can catch and build up on this rod and impede the flow. Take and hook any hair that may be down there. If the drain's clear then there's a partial blockage in the lateral,(horizontal ) drain in the wall and it must be snaked out.
Remove the "J" bend from the trap and send a snake up into the wall. You will run into a bend about 8 inches in. Work your way around it and put out about six more feet of snake. Afterward flush the drain with hot water.
Good luck, Tom