65A7400F is less then 3K on lazada.

2.8K:
https://www.macro.my/android-tvs/476-hisens...oid-led-tv.html
2.7K:
https://shopee.com.my/(FREE-SHIPPING)-Hisen...51172.719689401

Astro, YouTube ,Netflix......4k HDR...?
Any pic...?

Edit:
65" got Motion Enhancement and compensation (MEMC),try to play with.

On YouTube had many good quality clips for testing your screen.

check your "source" (contents)

low bitrate / poorly compressed materials = bad picture quality

Astro Ultrabox or older decoder ?

Netflix UHD or normal subscription ?

Wired and Wifi 2.4 is up to 100MBps, only Wifi 5GHz is above 100MBps.

You called it artifact?

I think its the black insertion aka memc. I just call it judder since I think that's what seems. Usually involved unpredictable movement like hair being blown, crazy matrix like move... I just tried the same scene with my old 50" plasma and it doesnt suffer as much.

want to ask, those that bought 65", what is your viewing distance?
I know those online recommended viewing distance, but want to know real life scenario how does it pan out.

Bro,

I just saw a hdtvtest video and found something interesting. Apparently those artifacts can be eliminated. I did a test and found that it helps.

Just goto motion and select custom. You can try and set yout preferred blur reduction setting but leave judder reduction to 0 or 1. Personally I feel 1 is still ok, can still see very minimal artifact occasionally but a 0 setting would totally eliminate the artifact.

Personally I think I would accept the slight ghosting over artifacts. I can leave it at 1 if I wanted since it was minimal but improve the fluidity (reduce ghosting).

Update:

Opps, you mentioned dark scene... But I didnt test dark scene. I only tested sports anime and natural effect like hair blown by wind. Could have no effect on your case.