It is the end of the line only if you want it to be.
I know of a couple of people who from ITE went to poly, and
subsequently, NUS. Seriously.
What I can say is that if your mentality is that you cannot
handle studying, then it is the end of the line for you, regardless
of whatever it is you want to do in life.
Please do not have the mentality that you will excel in computer
engineering just because you slapped together some gaming PCs, for
I know that computer engineering is a lot more than just that.