With the 3rd Test at Christchurch being called off due to violent incidents, New Zealand won the 2-Test series 2-0.
As you can see below, New Zealand has won all 9 Tests against Bangladesh at home. In Bangladesh, New Zealand have won 3 Tests and 3 were drawn.

We proceed to individual performances. As the number of matches played is small, no meaningful averages can be found.
Batting:
Most runs (250 and above):

Most of the top scorers such as Tamim and Williamson are still playing.
The most centuries are 3 by Williamson, and the most 50+ scores are 9 by Tamim (including 8 scores between 50 and 99).
Highest innings scores (90 and above):

Two double centuries were made by NZ batsmen in this series. Williamson’s 200* was the highest for NZ against BD at home, surpassing Taylor’s 200 in the same series and Guptill’s 189 in 2010.
Bowling:
Most wickets (10 and above):

Vettori is far ahead of Wagner and the rest. Vettori has 5 fivers and Wagner 3. Vettori also has the only tenner.
Best innings bowling (all instances of 5wi):

Best match bowling (all instances of 6wm):

Wagner’s 9-73 in this series is the best for NZ vs BD at home, surpassing CL Cairns’s 8-108 in 2001.
Fielding:
Most dismissals (8 and above):

Watling has the most catches by a keeper, McCullum the most stumpings and Taylor the most catches by a non-keeper. Mushfiqur leads the Bangladesh players.
Most innings dismissals (3 and above):

Kayes has the most dismissals (5). Several non-keepers have taken 3 catches.
Most match dismissals (5 and above):

Watling has the best figures for a match, while Sinclair has the most by a non-keeper.
All-round performance (match):

DL Vettori’s effort is the best here. It can be termed as one of the finest all-round efforts in all Tests, as he scored two fifties as well as a fiver and a “fourer”.
He is the only one to do this in all Tests. The “counterpart” would be AK Davidson who made 44, 80 and a fiver and a “sixer” in the Tied Test of 1960.