By the way, the battery is only about 2 years old, but it's from
Walmart, and their car batteries have proven to be the worst batteries
I have ever used, so I dont doubt these tractor ones are from the same
manufacturer.

I can't speak to the quality of Wally World batteries.

I suggest you do have a "battery drain" which is discharging it. Your
battery may have been damaged by being left in a seriously discharged
condition for a good time.

IOW: you have two problems.

You didn't say (or I missed) whether this is just a garden tractor or a farm
tractor or whether this is a "car/truck" battery or a motorcylcle battery.
But you can do simple "stand alone" battery tests where you charge it on a
bench and monitor the voltage while putting it to a moderate load (like some
lights, etc.) and then check it for self discharge. My guess, however, is
that it's toast.

If you don't have one already get a cheap VOM (Volt Ohm Multimeter) and with
the battery disconnected you can use the resistance function to see if there
is a discharge path with everything off. With the battery partyly
connected you can see if there is any leakage. Be careful here as you
can easily ZAP your meter. Try a high current scale first and then work
down. Don't do anything silly like turn on the lights while you have the
meter on a high sensitivity current scale.

At the other extreme it's possible that you have damaged your battery by
overcharging. A lawn tractor doesn't have a particularly sophiscated
charging circuit. When the battery is being charged the maximum voltage
should be 13.2 volts or less. When a charged battery is under no load but
not being charged the voltage should be 12.6.

But if I were better money I would say that a new battery would solve most
of your problems. If you suspect a current drain, still a quick disconnect
for your battery and use when you put the machine away at the end of the
day. If you suspect over charging, leave the light on even during the day
when you run the tractor.