S23 really slow sonce last update

So my phone is working fine on 5g after factory reset (may have just been bad service that day as I'm in the mountains and it was rainy) but wifi is extremely slow to the point that it won't load pages for minutes. Girlfriends phone is fine, laptop is fine. 

Any suggestions? 

Thanks. I'll try that

You might want to consider a factory reset then after backing up your device to a PC or online storage.

Yes. No changes but my phone is a pos now. My s10 was faster

I haven't had any issues with my S23 Ultra.  Do you have the Performance Profile set to Normal?  Have you looked at your app usage to see if any specific apps are using a lot of resources?