@Kushagra As a fan I am with you on New Zealand equally deserving the trophy. I also find the ICC rule of boundary count rule a little amusing. For that matter, one could think of many other stats as deciding factors…one such would be wickets left, NRR of the tournament, etc. At the same time, I think, since this is a competition there needs to be one winner among the best.
Tournaments are won not by one match but won by culmination of performance throughout the tournament. If you sit back and think, lady luck does not grace everybody and I feel the luck factor favors consistent performance over a period. In this case, one could argue that England had an advantage at points as well as NRR and hence probably had an edge over New Zealand. In this World Cup, in all fairness, England enjoyed that luck and won their maiden Championship trophy.
On a side note, I feel Kane Williamson is the best captain for his humble nature, his gentleman gestures with even opponent team players like the one when he rushed to console Carlos Brathwaite after the West Indies loss and his sportive spirit that we have seen during the tournament.