Using JSTS and google maps I get some lopsided ovals instead of circles like I would expect

Question

So I used the solution from this thread How to draw a polygon around a polyline in JavaScript? to solve my problem that I needed to have a radius drawn along a path. However it looks lopsided, like an oval when I use this method, even though on the thread the result doesn't look like this. I'm not using directions to generate my points, I already have an array of points that I'm passing to the function

here is what it currently looks like

function drawRadius(map, path, radius, factor)
{
  let radial = [];
  overviewPathGeo = [];
  
  for (var i = 0; i < path.length; i++) {
     overviewPathGeo.push(
        [path[i].lng, path[i].lat]
     );
  }
  

  var distance = (radius/1000.0) / 111.12, // Roughly 10km
  geoInput = {
  type: "LineString",
      coordinates: overviewPathGeo
  };
  var geoReader = new jsts.io.GeoJSONReader(),
      geoWriter = new jsts.io.GeoJSONWriter();
  var geometry = geoReader.read(geoInput).buffer(distance);
  var polygon = geoWriter.write(geometry);

  var oLanLng = [];
  var oCoordinates;
  oCoordinates = polygon.coordinates[0];
  for (i = 0; i < oCoordinates.length; i++) {
     var oItem;
     oItem = oCoordinates[i];
     oLanLng.push(new google.maps.LatLng(oItem[1], oItem[0]));
  }

  var polygone = new google.maps.Polygon({
      paths: oLanLng,
      map:map
  });

  radial.push(polygone);


  distance = ((radius*factor)/1000.0) / 111.12, // Roughly 10km
  geoInput = {
  type: "LineString",
      coordinates: overviewPathGeo
  };
  geoReader = new jsts.io.GeoJSONReader(),
  geoWriter = new jsts.io.GeoJSONWriter();
  geometry = geoReader.read(geoInput).buffer(distance);
  polygon = geoWriter.write(geometry);

  oLanLng = [];
  oCoordinates;
  oCoordinates = polygon.coordinates[0];
  for (i = 0; i < oCoordinates.length; i++) {
     var oItem;
     oItem = oCoordinates[i];
     oLanLng.push(new google.maps.LatLng(oItem[1], oItem[0]));
  }

  polygone = new google.maps.Polygon({
      paths: oLanLng,
      map:map
  });

  radial.push(polygone);
  return radial;
}