Lets see...
'how it behaves' ... care to elaborate?
Its range certainly leaves a lot to be desired. Certainly not NATO class even by 80s standard.
S-300 is pure import.
Brahmos was a joint venture, where India has successfully absorbed and extended the weapon.
In Syria, neither S-300 nor S-400 were deployed. It was old Buk air defence systems... BTW, Neither Babur etc are Tomahawk class nor you have money to keep an inventory of 100s of cruise missiles. Even with 70s interceptors, US had to deploy 100s of those missiles to saturate Syrian air defence.
Point is simple. Bombardier had a long experience in building all kinds of engines --including snowmobile engines-- before they jumped into aviation sector. Now, Pakistan can choose to start with bikes or cars or .... snowmobiles? Though I don't know why will they make snowmobiles. Technical base in any country comes in a step by step manner. You claim that Pakistan can suddenly make a Gen 5 fighter or a Fighter jet engine easily is what is hard to understand.
'My' Politician? There is no 'my' politician.
BTW, according to Pakistani politician, Pakistan's energy crisis was to be solved in six months. Or dollars will flow in sewer. Needless to say, none of it is true.
Who is claiming 'my' country and 'Civilization' was/is so advanced, and compared to whom? The claim is much more modest. When it comes to military technology, India is way ahead of Pakistan.
Relative to economy Pakistan is a bigger importer of weapons.
http://armstrade.sipri.org/armstrade/page/values.php
India 2016-17 6655 million dollars
Pakistan 16-17 1516 million dollars
Indian economy is 2.47 trillion 2017
Pakistani economy 305 billion dollars 2017
No.
http://armstrade.sipri.org/armstrade/page/values.php
Since 2000 till 2017 Pakistan has exported 62 Million dollars worth of arms.
While India only in 2016-2017 exported 98 million dollars worth of arms
Facts are not your strong point.