My Raven .25 worked ok.
My Jennings .22 was a jammer.
The worst was a Sterling .22 about 40 years ago.
I got none of them now.
Interesting that you would mention the Sterling .22. If I had to name the worst gun I ever owned it would probably be the Sterling. I bought one after reading an article in one of the gun magazines praising it to high heaven.
Also the fact that I had owned an Italian made .22 auto which the Sterling was a knock-off also influenced me. That little Bernardelli was a jewel.
My Sterling never fired more than one shot at a time. That is right, it had a 100% malfunction rate.
Wait, you forgot about the Lorcin. Yeah, the Lorcin it was REALLY the worst.