Random Shut downs, Freezes, Download Mode and other stuff

About a week ago, I updated my CyanodgenMod 12.1 rom and, suddenly, my note began acting nuts!

It started to freeze and randomly shut down with no warning. I wouldn't be able to power it back on immediately either. I'd have to remove the battery and wait at least 30 seconds before putting it back in and starting it.

I tried downgrading to back to the previous version but, it continued to do same thing even on the previous one.

I used Odin to go back to latest Touchwiz stock firmware and the firmware did it too. I've tried almost everything and now whenever I try use Odin to go back to the previous firmware before 5.1.1 December, Odin fails and gives me this message:

<OSM> Please wait..
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/004> Added!!
<ID:0/004> Odin engine v(ID:3.1100)..
<ID:0/004> File analysis..
<ID:0/004> SetupConnection..
<ID:0/004> Initialzation..
<ID:0/004> Get PIT for mapping..
<ID:0/004> Firmware update start..
<ID:0/004> SingleDownload.
<ID:0/004> aboot.mbn
<ID:0/004> NAND Write Start!!
<ID:0/004> sbl1.mbn
<ID:0/004> rpm.mbn
<ID:0/004> FAIL! (Auth)
<ID:0/004>
<ID:0/004> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)

My bootloader says this:

UDC Start
sw REV Check Fail: [aboot] Fused 4 > Binary 3
[1] eMMc write fail: aboot

Any suggestions on what to do or what's wrong?

Download from this link