iPhone updates have caused my 6 to stop functioning properly?

The recent iPhone updates have caused my iPhone 6 to essentially stop functioning. Some issues:

-The battery now dies within 30 minute of being 100% charged

-The phone is exceptionally slow to open apps, respond to touch, update any data (texts, voicemails, etc)

-The headphone jack always says the headphones are inserted, even if they are not (I've tried all the 'fixes' to get that problem resolved, but nothing works)

Am I the only one having these issues? If anyone knows of any workarounds to kickstart the battery or at least fix the headphone problem, that'd be much appreciated