Hold on, you're talking about a single borg cube taking out a super star destroyer?

Executor class Super Star Destroyer (Vader's flagship)
Length: 19km
Crew: 280,000, plus 1,500 gunners
Armament: 2,000 turbolaser cannons, clustered in fire-groups of 8 (250 clusters)
2,000 heavy turbolaser cannons, clustered in fire-groups of 8 (250 clusters)
250 Concusion Missiles
250 Heavy Ion Cannons
500 point defense laser cannons
plus 144 TIE series starfighters.

Imperial Class Star Destroyer (Standard ship of the Imperial Fleet)
Length: 1.6 km
Crew: 37,000
Armament: 8 Octuple barbette Turbolaser cannons (8 barrelled turbolaser cannon arranged 2 rows of 4)
5 Heavy turbolaser batteries
30 Turbolaser batteries
20 Heavy Ion Cannons
plus 72 TIE series starfighters

Compare to star Trek

Sovereign class:
Length: 685 m
Crew: 885
Armament: 14 Type-XII Phaser Arrays
5 torpedo launchers (3 fore, 2 aft)

Defiant class:
Length: 120 m
Crew: 40
Armament: 4 Pulse Phaser Cannons, 4 torpedo launchers (2 fore, 2 aft)

Akira class:
Length: 465 m
Crew: 500
Armament: 6 Type-X Phasers, 3 torpedo launchers (2 fore, 1 aft)
40 Kaneda Class Space Superiority Fighters

Klingon Bird of Prey (B'Rel):
Length: 88 m
Crew: 14
Armament: 2 Disruptor banks, 1 torpedo launcher

K'Tinga battlecruiser:
Length: 215 m
Crew: 392
Armament: 8 disruptor banks, 2 torpedo launchers (1 fore, 1 aft)

Vor'Cha Class Attack Cruiser:
Length: 480 m
Crew: 1900
Armament: 16 disruptor banks, 3 torpedo launchers (2 fore, 1 aft)

and finally: Borg Cube:
Length: 3 km
Crew: 640,000
Armament: 36 Programmable weapons arrays, 12 focused neutron beams, 24 tractor beam emitters

Now unless there is a huge difference in weapon power from one series to the next, the Executor class would demolish all, and a Borg Cube vs Imperial Star Destroyer would be a straight up good fight.