I think it can be covered and improved, but thing is that it will require a very specialized, talented and experienced tattoo artist to handle that problem.

However, in order to show that you that your problem can be improved, take a look at this work by All Day: https://www.instagram.com/p/BMp-jCeBnc3/

As you can see the tattoo was significantly improved and now looks badass, and the same can be done for your tattoo. I know that traveling to Bangkok is not very possible for most of us, but you can find a pretty good artist in your country as well, it is just matter of picking excellent and reputable parlors and asking, and if possible, you should go on free wall-in consultations.

Anyway, I wish you luck and I hope you get your tattoo covered!