Okay, so when it was built what more would he want to do?

How effective was the wall in keeping millions and millions of unknown people out? 

Was the border erased, or was the wall completed? Did the alleged completion of the wall erase the southern border? 

Do MAGA's ever pay attention to the contrary things he says?

Sounds like he says these things for his unquestioning parrots to repeat. Maybe they will obey and stop saying "fake news." That they will stop taking sides, They will no longer complain and criticize. 

38. “We built the wall. We completed the wall. And then we said, ‘Let’s do more,’ and we did a lot more.

7. “Our southern border has been erased and our country is being invaded by millions and millions of unknown people, many of whom are entering for a very bad and sinister reason. And you know what that reason is.”