By Harry Davies Myles Stephenson, who won X Factor with boy band Rak-Su in 2017, was beaten in his boxing debut after quitting on his stool. Stephenson was making his ring debut against fellow singer DTG at Misfits Boxing 012 in Leeds on Saturday night. The 32-year-old had a huge size advantage over his rival but it mattered for nothing as he was dropped in the first round with a big right hand. DTG pushed for the finish but Stephenson was able to make it to the second round. DTG picked up where he left by continuing to beat up Stephenson, who showed little offence after picking himself up off…