This is the first drama I have ever dropped unfortunately, as I do not continue watching a drama if it falls below a 5/10.
Now, what went wrong, for me at least? The idea was inventive and I liked it. But how should I explain Abyss in the most honest way possible?

Abyss is simply boring.

I don't care about the characters or what happens to them later on in this series. A 1 hour episode honestly feels like 2/3 hours long. Cringe script writing, awful acting at parts, mega-slow pacing at parts, too.

I welcome people to still try out Abyss, but don't say I didn't warn you. I feel you'll find yourself dropping it too.