Raikou uses Frustration - it's super effective.

It's rng, yesterday 1 ran away after 9 golden berries, excellent throws and curve balls. 2nd 1 with low iv caught with pinap berry, excellent throw and curve ball after 4 balls.

I hate this effing beast.

I didn't even catch a one above 82% IV.

And here I am, I had no problem with any legendary beast. It might take a few Golden Razz at times but I caught 75% and easily. Raikou I'm 9/11 or so. Just do the Prodigies Nation method and try some Golden Razz if you want to catch it.
That's probably what you're doing anyway.

Raikou was the thorn in my side too. Ended up about 5 from 20 - dismal, but got a good one and that's all you need. Keep trying, and remember it's not you that sucks, it's rng

Just RNG. I’m 7/8 for Raikou, almost the opposite to Moltres. Get ring to correct size (I normally go for Great), release ball just when attack is closest to you, voila! You can’t do anymore, the rest is just luck. Curveball of course!

Talkin about raikou luck ...
After catching 13 raikous in a row %100 ran from my 12 balls. I was 20/22.
Never seen any another %100 . talkin about +300 raids

I caught almost every Suicune I had a go at, but I'm only at 50% on Raikou.
It's just so damn stubborn!

And I also get the feeling that more of the people I raid with fail to get Raikou compared to Suicune.

For what it is worth (randomness...)
I caught one yesterday, Pinap berry applied immediately, missed a few curve throws, but finally hit it with Great throw... and it stayed inside.

You have him for a whole month, unless you're swimming in Golden Razz I would simply normal Razz any Raikou that isn't above par. My best one is 98% and it took every single ball out of 12 to catch it.

Also, I only go for great throws but that's because I don't want to ever miss the circle

Entei was the one that wouldn't cooperate for me. It took six tries before I caught my first one, and I even had one run away after 10 out of 11 throws were excellent curveballs. Then everyone lost interest in Entei and stopped raiding him for the 2nd half of the month, so the best one I caught was 1893 CP.

All you can do is try enough times to have some better luck, but at least Raikou is one that people keep raiding the whole time it's around.

Im 8/13 on raikou including 1893 and and a perfect one which i caught only in a third throw.nice throws works for me best and curve ball after the attacking animation.caught some low ivs(pinap) during the 2x candy event

PS: I dont know how to throw excellent throws