Why does my child object to napping so much?

Daughter is 5 weeks old. Every day. EVERY DAY. I spend probably 90 minutes to 2 hours trying to get her to nap in the afternoon. I put her down in her crib asleep and every day she’s up and crying within 5 minutes. I know she’s tired because she hasn’t slept in hours (I don’t try to keep her awake, she just doesn’t nap). I got excited just now when she was asleep for 20 minutes, then suddenly she started crying again. This is the most stressful and frustrating part of my day every day. It frustrates me to tears sometimes, especially because I know how important it is for newborns to get a lot of sleep.

Sorry, just needed to vent.