The cause maybe ”wet wood” or poor construction. i did not see an anti sag kit in the photos.

Based on the photos, the fence is not ”straight”.

I had the anti sag kit on it and it didn’t improve so I took it off. The gate was fine when I first did it so it was straight before. The gate is the only thing that’s changed

The gate was fine when I first did it so it was straight before.

What did you do? What was straight before?

The gate was straight and lined up with the fence. This happened over 6 months or so. I know gates will sag even with support so I expected this but even with an anti sag kit it wouldn’t fix it. Most gates sag and drag the ground. Mine did the opposite which it fell in towards the top of the post instead of the ground. If you see the photos the bottom looks kicked out and there’s a gap. The entire gate looks crooked now but obviously I wouldn’t have left this if it was this way right away putting it on brand new.

Call the fence company if it's only been 6 months.

I am the fence company

Maybe it is your photos, but your fence does not look ”straight”, both vertical and horizontal.

Here you go.

?

Joseph linked a youtube video. Looks like it'll solve your problem and it was fun to watch too :)