Air carrier Captain reported a lack of flying proficiency of First Officers in the one to three years in the 737 fleet. Some issues manifested themself during the final approach stage which added an additional workload on the Captains.

Narrative

This report is to bring attention to the general lack of proficiency of FO's with 1-3 years on the B737 and below 10000' on arrival. The overwhelming majority lack the training and skills required for effective energy management; primarily in the approach regime.In ZZZ; we are constantly told to hold 210k to a fix then 170k to the FAP. Many of the FO's fly the glideslope flaps 5 and 210K. They wait until reaching the fix to roll back the speed and attempt to slow the aircraft to 170k. All experienced 737 pilots know this does not work. As monitoring pilot; my workload has increased exponentially in a critical phase of flight.Landings are an area of concern when it is gusty or there are x-winds. Many choose brakes 2 on the autobrakes. I no longer allow this and advise brakes 3 because they consistently land 2500-3000' down the runway.Per the FOM; captains are required to mentor FO's. I believe the language should be changed so that the 1-3 year FO's know they will be mentored and trained by the line captains. There is a distinct difference between mentoring and training. More than half of these pilots are less than receptive to training tips during the debrief. Once they are off probation they think they are done.I rarely fly with a FO that has more than 3 years on the B737. These comments apply to the vast majority of this segment of the seniority list.It is exhausting knowing that every leg they fly; below 3000' will not be normal.