Disconnected my battery because something was killing it

Hello,

It sounds like your vehicle has an excessive parasitic draw (current drain).
Every electrical circuit with a battery will have certain amount of parasitic draw. But it can become excessive due to faulty components. Like a glove box light staying on or a shorted window switch etc.

Here is a helpful guide of how to find parasitic draw:

https://youtu.be/z5F7WpgjaRs

https://www.2carpros.com/articles/car-battery-dead-overnight

For the no start issue, have you tried to jump start the vehicle?
You could just have a weak battery due to having the parasitic draw.

https://www.2carpros.com/articles/how-to-jump-start-car-battery-using-jumper-cables

Please let me know of any questions.
Thank you.