The one load that it does seem to be best with is CCI Quiet and with the 22 inch barrel it's basically a suppressed rifle minus the suppressor.
When it comes to .22, I have about 7 or 8 different go to ammo's that I use. CCI SV, Velocitor, Quiet (for non semi autos), Stinger, Aguila SSS, Winchester White Box, a couple others and if there's a .22 rifle I have that doesn't like any of those, it's pointless for me to keep because it's forcing me to hunt for an ammo it likes that I'm not going to use in any of my other .22's.
My other .22 rifles I have shoot several of my go to .22 ammo well to excellent, so they're keepers.
I'll have to think about whether the Marlin being good with Quiet is worth it. The plastic stock is the cheapest plastic I've ever felt on a gun, the iron sights were awful, the tube magazine malfunctions when a certain number of .22 Shorts are in it. If I could go back in time, I would have bought a Henry instead.
The stock could very well be the problem if it flexes a lot. Not sure if you can find a takeoff wood one for that model but .22 wood stocks often come up cheap on fleabay.