Don't feel like you are the only that was taken in. Delcath was only my third stock trade and I bought in early in 2017.
My first trade went bust, my second trade went to the grey market (still holding) and of course there is Delcath.
Unless I see some sort of "Hail Mary" news this week, I will be moving on and taking tax write-offs for the next decade as it will be going to the greys or delisted completely in my view.
The only thing positive I can say at this point is that it has been a great (but costly) learning/educational experience for me.