How to say this sentence?
 

First time here!

How do you say "You're horrible at responding to e-mails!"

?

Mike

Who are you writing to?

i ask because a sentence like that is a can EASILY be taken the wrong way. Like you are very angry. Unless you actually are really angry.

I'm not very angry. It's a friend and I am a little bit annoyed but not angry. :)

もっと早く返事してほしい。

This means "I wish you would write back quicker."

That's a bit more serious than what I'm looking for. I want to emphasize that her replying to emails is horrible. ie, forgets often or does it slowly.

What you are asking for sounds a lot more serious than what I gave you.

Well from a guy girl dating sort of view that sounds a little desperate to me. I guess I didn't describe the situation enough.

I feel like I can joke around with her easily saying why are you so horrible at replying to emails rather straight up saying than I want you to respond to emails faster.

I was thinking something:

なんでメールに返事するのがそんなに

And then what is the right word here I wonder. わるい、へたくそ、よくない

But none of those really feels right to me.

See, that's why I asked what the relationship was in the first place...

よくない or へた should work.

I apologize for my lack of description!

No problem. Relationships are defined by language and vice versa in Japanese, and it's easy for non-Japanese to cross delicate lines.

And I would never say anything my Japanese girlfriend did was へたくそ