Don't really have anything that falls in this category because if I don't like them they go down the road immediately.
I'm pretty ruthless with rifles I dislike.
^^^^^^ This ^^^^^^
Had a Rem 700 BDL in .308 Win that was wicked accurate (possibly the most accurate rifle I've owned) but very hard on cases.
Had a Handi-Rifle in .308 Win that would pop open on firing.
Had a Ruger American .30-06 that I couldn't get to shoot with factory ammo.
Had a Ruger #1 in .280 Rem that was a .5MOA shooter with multiple loads but much too pretty to elk hunt with.
In each case, "Had" is the operative word.
The Rem M700 and Handi-Rifle funded my first AR-15 with uppers in .300 Blackout and .223/5.56 Wylde. The Ruger American and Ruger #1 funded a Ruger Scout in .308 Win and a Ruger All-Weather Hawkeye in .280 Rem.
