Why NCL is not providing 400/500 runs innings regularly?

[yaseer]

We have seen some matches in National Cricekt League. Like past years, NCL is not getting big innings (400+) regularly.
In our neighbouring nations(India, Pakistan), They are getting innings more than 400 in almost every match.

What could be the reason for us not getting big scores regularly? Is it the lack of ability of our batsmen? is this the pitches they play? is this our bowlers are very difficult to survive? or something else?

Whatever the reason, we need to solve that out very quickly, because it is one of the main reasons for us not getting quality batsmen or reason behind our national batsmen not scoring consistently.