GA pilot reported that the windsock gave false indication of conditions and is in need of repair.

Narrative

I was returning from a cross country trip and landing at 3A4. I'm retired and typically a fair weather pilot most of the time; so on most days the windsock is of minor concern. However; upon arrival; the effects from a Nor'easter off the coast created conditions that were more windy than normal. I checked the METARS at GSO and BUY just prior to landing and was expecting to land with a right quartering headwind of 11 gusting to 22. I also expected some indication from the windsock to help with final moments of approach and landing. Just before arriving over the threshold; I noticed the windsock was down and flat. Not indicating any significant wind. However; this was certainly not the case and the landing was challenging. Fortunately; I had expected the challenge.After securing my plane; I investigated the windsock and saw that the rotating frame was not rotating and the windsock was rendered unusable with the position it was in. I noted that it was cocked and the housing had apparently fallen down out of the bearings. This windsock was recently installed new; replacing one that was ripped to pieces. The one it replaced was unusable for months prior to its replacement.Along with the continuing decline in the runway conditions; I feel like the windsock condition is simply neglect. In this case it could have been detrimental if I had not had the foresight to check the METARS or the skill to handle the conditions that were contradicted or incorrectly indicated by the windsock.