WTF did you enable devel (devil) repo? Especially when you do not know what "root" is?

And I am totally fed up with such attitude!
GTF and educate yourself.

Sorry for that little rant, but there are hundreds of warnings about devel and rootsh and so on.
And even there lots of threads with same/similar problems.
You did the harm to your device, so do not expect me to spoon fed you.

Enable R&D Mode with flasher, do apt-get clean (this will remove some space from rootfs), and then deinstall the most not-optified programs.
I think you bought the device second-hand and the former owner installed a lot of non-optified stuff.
Easiest thing would be to do a full reflash.

What PR is that device running?
What does "dpkg -l" give as output.
Or easier "dpkg -l > MyDocs/packages.txt". Upload this list and maybe some guy will check it.