Is this Normal?

Looks okay to me, even if he was facing right when you first saw him, he probably heard you coming, and I think he started shooting you, before you started shooting him.
This basically. You also aimed quite low. If he gets on your head with the gun he was using, he gets you in no time, like in the video.
 
Thanks for the report @Darkbolt_Asta_90

I played this back at .25 and .50x speed and I agree the scene looks suspicious af as ThorDog60 was busy firing rounds at another player, killed him and then quickly turned to dispose of you too. All within the same clip and motion.

I don't believe it was a glitch in the game as we have all experienced before and some suggested earlier in the comments.

I did a quick check on this player's stats and nothing that I could see stands out, at all. Very average at best.

My best guess, with such a short clip, is the player got lucky.

I'd suggest to just let it go for now unless we have other claims with a sudden climb in his stats.

Just MHO.

Cheers!