Out of curiosity could you try enabling the ‘Small Network Packets’ option within the ‘Network’ panel, to see if there’s an improvement? Whilst you’re in there, do make sure your ‘Max Upload Speed’ represents your actual upload speed. 
Out of curiosity could you try enabling the ‘Small Network Packets’ option within the ‘Network’ panel, to see if there’s an improvement? Whilst you’re in there, do make sure your ‘Max Upload Speed’ represents your actual upload speed.