well, I'm sure lovenokia feels bad about it, no need to point fingers, we all learn from our mistakes, but we also need to have courage to admit it.

I'm glad you are doing your best for him now and I'm glad you're seeking for advice. My advice - get timer and hydrotherm, that will do a lot for your busy schedule, it is ok to feed once a week for a 2 weeks, in nature they don't get fed as a clock too. some adult frogs are on once a week schedule depending on their needs, if they are having a big meal it is ok. More importantly you want to monitor your conditions - timer and hydrotherm will do that with zero work/time from you. Those are truly life savers + they help save some $ on your energy bill as well.

so now your frog he is eating, that is good, you're saying he looks better, that is good too. how big he is? and long ago did you found him "almost dead"?
try not to give him a large meals at once, offer smaller amounts but more frequently and watch him, how he behaves, how he poops. reptiboost would be more beneficial is given per os ( per mouth), although some of it will be absorbed from water as well, but you want to do a dechlorinated water bath after soak with reptiboost.
Do a electrolyte ( unflavouted pedialyte) bath for him, 1 part of pedyalyte 10 parts of water. and then give him reptiboost. and after give him space and time. If he is eating he should be just fine.