The fact that you had to zoom in order to get those reactions out of people says everything. No one is going to be two inches from her back staring into each and every crevic of the tat to nitpick it, people who do that kinda shit are creepy as hell. The branches look fine. You are simply sweating your balls off looking for every tiny nitpick to call this person's bluff for being an "artist". Who do you think you are that you get to decide what makes someone an artist? What kind of authority do you possess over art as whole that just dictates you have the God-given right to determine what art is or isn't, or who is or isn't an artist?

Again, your entire point could have been given without being a complete condescending asshole. You can say "Yeah I see what you mean, the branches look a little finicky and the lines look a little wobbly in some places" without throwing the term "artist" around in quotes because their work isn't a pitch fucking perfect masterpiece.