Tattoo cover up.

Hanna
I have these two tattoos. I got the "family" one when i was 20 so 4 years ago. I got the butterfly one 7 months ago..its horrible and the tattoo artist didnt know what he was doing. I went to a different place (my usual place) and they said they couldnt really fix it and id probably have to cover it. I just want to know for some ppl who have gotten a cover up or knoe tattoos..if i get them covered up will the tattoo have to be big and dark?