Geo-Referencing an image from google maps with gdal_translate

I am trying to geo-reference an image using gdal_translate in a command prompt. Currently I have the following

gdal_translate.exe -of GTiff -a_nodata 0 --config GDAL_DATA "Config location" -a_ullr -77.057275 38.872024 -77.054672 38.869986 -a_srs EPSG:3857 "Input.tif" "Output.tif"

Where the config location is the location of the gdal data files.

The issue I am having is when I open the image it has lost its aspect ratio. I believe it has something to do with the projection but I am unsure.

gdalinfo.exe gives the following info.

Driver: GTiff/GeoTIFF
Files: Output.tif
Size is 1950, 1950
Coordinate System is:
PROJCS["WGS 84 / Pseudo-Mercator",
    GEOGCS["WGS 84",
        DATUM["WGS_1984",
            SPHEROID["WGS 84",6378137,298.257223563,
                AUTHORITY["EPSG","7030"]],
            AUTHORITY["EPSG","6326"]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433],
        AUTHORITY["EPSG","4326"]],
    PROJECTION["Mercator_1SP"],
    PARAMETER["central_meridian",0],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    EXTENSION["PROJ4","+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +wktext  +no_defs"],
    AUTHORITY["EPSG","3857"]]
Origin = (-77.057275000000004,38.872024000000003)
Pixel Size = (0.000001334871795,-0.000001045128205)
Metadata:
  AREA_OR_POINT=Area
  TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)
  TIFFTAG_SOFTWARE=TwelveMonkeys ImageIO TIFF writer DEV
  TIFFTAG_XRESOLUTION=72
  TIFFTAG_YRESOLUTION=72
Image Structure Metadata:
  INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left  ( -77.0572750,  38.8720240) (  0d 0' 2.49"W,  0d 0' 1.26"N)
Lower Left  ( -77.0572750,  38.8699860) (  0d 0' 2.49"W,  0d 0' 1.26"N)
Upper Right ( -77.0546720,  38.8720240) (  0d 0' 2.49"W,  0d 0' 1.26"N)
Lower Right ( -77.0546720,  38.8699860) (  0d 0' 2.49"W,  0d 0' 1.26"N)
Center      ( -77.0559735,  38.8710050) (  0d 0' 2.49"W,  0d 0' 1.26"N)
Band 1 Block=1950x1 Type=Byte, ColorInterp=Red
  NoData Value=0
Band 2 Block=1950x1 Type=Byte, ColorInterp=Green
  NoData Value=0
Band 3 Block=1950x1 Type=Byte, ColorInterp=Blue
  NoData Value=0