constructive criticism ?

hav nthing to discuss today so thought of asking dis from the forum members

according to me it mean

a valid criticism ...like d other day some one opened a post saying abt the dresses of paro ...i think dat girl had a view point n she raised her point ...i found it constructive though i didnt agree wid her point

talking abt leads chemistry , y a person think its not working ...dat too is understandable

violence is too much ...fine good point may b some viewers can not handle lot of blood sheds

but criticism like

y its a hate love story , dont dey hav nything other to make we hav watched it so many time...

dats the concept of the show u cant change it

y male lead is fighting with 3 guys ...the male lead is an army officer not a common person, army ppl r trained to fight like dis...even in real life if ny officer is in dis kind of situation he has to deal wid it

y d cars n bikes r fliying ...its a action show , n if cars or bikes burst dey do dat kind of stuff only ...if we see movies like border, lakshya , LOC der also u will see dese kind of scenes

how can a criticism to the main concept be taken as constructive criticism

if nyone is not liking d concept doesnt dat mean he will never like d show as d person is against the concept of shows like dis

like i dont like the concept of south indian movies or dabang n no matter how many times i will watch it i wont like it cauz i m basically against dat kind of movies only

plzz explain to me !!!!