No. For my reply, simply refer to the Battle of the Somme. The Germans had Maxim Machine guns. The Brits, who had rejected Maxim and his invention for many of the very reasons you have given here, suffered 60,000 casualties on the first day of the battle. Overall, the first day on the Somme was a failure for the Allied forces. The British had suffered 19,240 dead, 35,493 wounded, 2,152 missing and 585 prisoners for a total loss of 57,470.
Some Allied regiments were wiped out to a man in less than an hour.