This is not bashing but telling the truth that everyone is reluctant to say. This is like a bad calculus equation to start off with. The harder you try, the more messed up it becomes. You eventually end up with a completely different equation from where you started. That's what happened with the HAL Tejas. If my memory serves me correctly, its avionics and airframes were so poorly designed, that external drop tanks cannot be dropped after emptied, since it would offset the balance and down the aircraft. Honestly, this is a joke. All of you here probably know about the single winged F15 in Israel in 1983. Even computers and designs back then from the 70s could fly without a wing. How could the Indians not solve the simple problem of a drop tank.
The best thing to do is to completely ditch the project, but use the technologies gained, and start with a clean sheet of paper. Or else, it's just going to be like a bad math equation. If you start wrong, you'll simply be more messed up as you try harder and harder trying to solve it.