Let’s address the most serious issue first! AMPS! You CANNOT test amps by touching the probes to the terminals like you do volts!!! Amps must be tested ‘in circuit’ with a load, and a typical VOM meter cannot handle the current flow (amps) of a good battery under load! You need a load tester, even a cheap Harbor Freight unit can suffice. A meter will blow its fuse, you hope, or it will be fried.

A reading of 11.4 volts is a very dead battery. I suspect your charger never kicked into charge because it never sensed a load. This is where a parallel hookup with a good battery can help. Try that. Connect the batts positive to positive and neg to neg then attach your charger. As the charger charges both batts at some point (maybe after an hour or so) you should be able to remove the good battery and charge just the dead one, by now you should get a better volt reading on it....like maybe 12 volts.

If the batt is any good it should charge to 12.6 to 12.8 ish. How much capacity it has is still in question and can only be tested under a load.