If you're gonna play all tanks at the basicl level, you'll get bored.
Trying to optimize your gameplay will make all tanks interesting. Regardless of what people say about DRK, I actually enjoy playing it.
DRK is more about managing both MP and blood gauge to maximize your damage rather than Bloodspiller spam.
Do not overcap MP and blood gauge. It's a DPS loss. Doing this is easier said than done.
You need to know how much MP and Blood your abilities generate and how far you are from overcapping them.
Which phases are you going to hold your resources and which phase are you going to spend them for maximum dps gain (Burst/Buff windows).
Also, keep in mind that you need your resources for The Blakist Night and Living Shadow.
DRK also has a tight Blood Weapon window in which you need to land 5 weapon skills while it's up in order to maximize your MP and Blood gain, else you'll be generating less MP and Blood which will lead to lower DPS. Doing this might require you to have a certain amount of skill speed.
If DRK was just about 1-2-3 and hit Delirium followed by Bloodspiller spam, the job is going to be brain dead easy but it isn't.
DRK is more about resource management and deciding when to spend them for benefit.
I would recommend reading in-depth guide about all tanks before deciding which one to play :)
Here is a website to help with that: https://saltedxiv.com/
