Shite hardware is always an option. Microsoft have previous. Alhtough my pads and machine have taken some real nonsense and are still going. The machine has been flippwd a few time, lost a few games as the laser likes to burn the disc when upside down, xbox remains
The pads have been crushed, twisted, thrown, bounced, smashed and shouted at numerous times over the last 6 years. I've known folk who's machines died if you brought home the wrong make of teabags from the shop. Mines is 2nd gen as well, well before they started makin em reliable in any way.