My iphone keeps crashing no matter what

My iphone keeps crashing no matter what! I tried to back it up into itunes and it just makes the iphone keep crashing. So eventually I was fed up with this and restored it. I backed it up after it restored to itunes, it still crashed a whole bunch of times, and then I backed it up to icloud.still keeps crashing. I'm So done with this goddamn iphone.anybody have a suggestion on what I should do now?
(Also, I can't just buy a new iphone or upgrade. My parents spent a fortune on this iphone).

Added (1). Oh and if this helps, I updated the software today in hopes it would stop the crashing. It just crashed even more.

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