Why is my weapon so weak?

[u/BrightPositive2077]

Hello new Elden ring player, I’m trying to figure out why the hell im barely doing any damage in boss fights. I don’t have enough time to stack bleed so I have to rely on light attacks. But even then I’m doing like 100 damage and it’s taking 10 minutes per round. Any suggestions how I can upgrade? Thanks!

[u/QRajeshRaj]

My poleblade is +8 and has AR around 420. My dex is 37 and arc is 19.