1999 SW2 no start

[Spaceman Spiff]

Please help. I'm going crazy with this.

I've had this Saturn for about six months and drove it as my daily commuter. After having no issues for that time, I gave it to my daughter for her first car. Then one morning it won't start. Right after the temperature dropped to the 30s. So we jumped it and drove it couple miles. Turned it off and restarted it no problem. Of course I knew I'd probably be back the next day. Sure enough, it wouldn't start again. So I bought a new battery and came back and installed it and all was well. That was on a Friday. The car sat all weekend and then I told her to start it Sunday night just to make sure it would. It started fine. Then the following morning I get another call. Not starting. So I went back expecting to find a parasitic draw and found that the car was cranking too slowly. Battery was fully charged, so no draw. I tested the fuel pressure and it was fine. I checked the f5 situation and it looked like every other connection. So I went for the Crank sensor and did that and no different. Towed it back to my house and tested the starter incorrectly. Ordered a new starter thinking that was it. It wasn't, won't even turn over now.??
Then I found a thread here and tested the small bolt on the starter and got 0 volts while cranking. I wish I did that before buying a starter. I also notice that the key fob transmitter is no longer working. How do I test further from here? Did I fry something when I jumped it? I hope I don't find some aftermarket alarm/starter kill bird's nest of wires.

PS The original battery was definitely bad.

Sorry about such a long-winded first post!