There may be observed in polite society a great deal of coquetting about the Devil, especially among divines. They qualify him as the evil spirit [Mormons too (because God didn't give him body): Mosiah 4:14, Mosiah 2:37]; they consider him as synonymous with the flesh [sometimes, but mostly the Devil uses the flesh as a wicked joystick: 2 Ne. 10:24, Mosiah 16:3, Mosiah 16:5, Helaman 7:15]. They seem to wish to divest him of all personality [whatever! Satan has a personality and it's horrible: 2 Ne. 28:22, Alma 30:60, Moroni 7:12]... Hell is popularly considered as metaphorical of the torments of an evil conscience [No way, Satan's a real dude not our pained psyches: 2 Ne. 2:17, Alma 30:53, Jacob 7:18, 3 Ne. 18:15] and by no means capable of being topographically ascertained [OK, so Mormons don't know where Hell is (maybe Outer Space/Darkness) but they certainly know it's physical: 1 Ne. 14:3, 1 Ne. 15:35]. No one likes to mention the torments of the everlasting fire [um...: 2 Ne. 9:16, 2 Ne. 28:23, Jacob 3:11, Jacob 6:10, Mosiah 3:27, Mosiah 26:27, Alma 12:27] and the poisonous gnawing of the worm [try 'dragon' or 'monster', buddy!] that liveth forever and ever [2 Ne. 9:16, 2 Ne. 9:19, 2 Ne. 9:26, 2 Ne. 26:22]. (From Essay on the Devil and Devils, 1820.)
In other words, if you're doubting the literal existence of Satan, his angels/devils and Hell, YOU HAD BETTER RECONSIDER! THIS SHIT IS REAL!!
"Ouch! Ouch! Ooouch!!"
Don't doubt that this is one doubt you'll be eternally sorry you never doubted! Neither popular opinion nor careful research can save you.