mobile

Hi guys I have issues with my s4, I had a Nexus 5 but i sold it and I got this S4 from my wife, the first thing what I did was install a rom GPE and worked perfect better batery life little more fast etc but around 2 mounths ago I was using the whatsapp and suddenly the app crashed I restart the phone and the nightmare began, when the phone started worked but after 10 seconds the system crashed again and restart (bootloop) the first thing what I did was a factory reset (I wiped cache, Dalvik, etc) but the issue continued, then I try to install 5.0 rom (I downloaded from this site) and the phone dont start (bootloop) I wipe format all and the installed the original frimware (from sammobile) and was a little more stable but the wifi and bluetooth don't worked the phone get very hot and the battery was drained. I dont know what i can do with this phone do you know if this could be a kernel issue? i don't know much about kernels and if this could be the problem what do you think guys?

Sorry for my english Im learning