Get on Google Earth and type in Pulau Langkawi and then look at it in relation to the radar track heading. Two plus two equals four.
For you maybe but for me your theory makes little sense. There is no 2+2 = 4 here, at least we are far from any such simplicity.
You have to explain why this aircraft turned sharply South (or North) after exiting the Malacca straits. The aircraft trajectory and its zigzagging even inside the straits makes little sense when compared to possible approaches to Langkawi airport. If on the other hand you claim that the aircraft never exited Malacca straits and crashed somewhere there then you better find it... water there is very shallow, search area limited, it is also a very busy area and pieces should be floating now for everybody to see. By the way your post is exact replica of hundreds identical, not much originality.