Well, maybe being an actual critic would help.
I don't see why you would need a week to do that tbh. Most artists who know what they do draw something like that in under 1 hour, maybe need a bit longer since lineart is a b*tch sometimes.
Okay.....AND? If you're going to criticize how long it took to make the pic, how about giving some tips to speed up the process? All you did was drop in here & say, "LOL dis noob is slow. Real artist can do this in an hour. Git gud scrub."
No tips, no advice, no references to those artists who can do it in an hour. No anything to help them learn how to make fanart faster. You're not criticizing, you're just shiting on them.
Also, why does even make how long it took them to make it? If it was a commission for someone or something they did for a project or company, sure time is important. Even then, 1 week isn't going to kill them.
But this was a casual fanart piece made for fun. Let's also consider the fact that they have lives outside of their art.
And you should work on poses and styles that actually fit your character instead of random cute girl fanservice.
This part is subjective as shit, bro. Some artist just like drawing fanservicey pics. There's nothing wrong with drawing how they want. Just because you don't like it doesn't mean they have to change it. It's not about fitting the character, it's about fitting the ARTIST'S own personal INTERPRETATION of the character into THEIR STYLE. Whether you like it or not is your problem, not theirs.
Something that is subjective is not something you can criticise. Subjective is about one's own personal taste.
So like I said Mr. or Ms. Asshole, if you want to be a critic, actually be a fucking critic.