I'm not sure whether I'm more shocked you have multiple reasons/causes for breaking your phone or that you have enough data points available that you can reliably identify a "main reason" amongst those multiple reasons.
Seriously, have you considered taking better care of your possessions?
How the hell do cabled headphones lead to a broken screen? I've owned quite a variety of mobile phones over the last 23 years, have never used a case to protect any of them, have used cabled headphones with a bunch of them, and the only one I've broken is one that I deliberately dropped into a glass of vodka and coke back in the year 2000 because I was smashed off my tits and it seemed like a good idea at the time (it wasn't, even though I'd been planning to replace it anyway - in the interim the lack of a phone was a major PITA for several days).
I'm not sure whether I'm more shocked you have multiple reasons/causes for breaking your phone or that you have enough data points available that you can reliably identify a "main reason" amongst those multiple reasons.
Seriously, have you considered taking better care of your possessions?
How the hell do cabled headphones lead to a broken screen? I've owned quite a variety of mobile phones over the last 23 years, have never used a case to protect any of them, have used cabled headphones with a bunch of them, and the only one I've broken is one that I deliberately dropped into a glass of vodka and coke back in the year 2000 because I was smashed off my tits and it seemed like a good idea at the time (it wasn't, even though I'd been planning to replace it anyway - in the interim the lack of a phone was a major PITA for several days).