sRGB mode isn't hot for calibrating sadly. Do a factory reset and re-do the calibration process, also check to see if the colour controls or 'enhancements' in Catalyst Control Centre are turned off.
This monitor should have no problems getting close to D65 white, 2.2 gamma and DeltaE < 2, should get a refund if it won't, obviously defective unit.
This monitor should have no problems getting close to D65 white, 2.2 gamma and DeltaE < 2, should get a refund if it won't, obviously defective unit.