Wifi random disconnecting

I've had WIFI issues and general connectivity since the iPhone 12 pro max release. Whenever its a 5g, LTE, wifi or simple apple wallet not getting connected to the phone, - to me its all working super unreliable on all iPhone 12 pro max + models. Today, I'm owning a brand new iPhone 15 pro max. I on purpose didn't backed up from an iCloud, apps and data from previous phone and set it up as a new phone just to make sure i don't bring old issues to the the new phone. (yes, its real, and its an issue with apple backups downloading your own old bugs). Random WIFI disconnects dint go anywhere, there are just less frequents, but more noticeable as with previous iPhones, its would just stop operating anything but will still tell you, you are on wifi, just no internet. Well now, its almost the same thing its just really kicks you out of the network and you at least can use cellular data. I guess my question is, when this is gonna stop ? I know the answer more or like goanna be when apple will come up with their own 5g modem, but that should not to be used as an excuse on luxury phones. Since an iPhone 12 pro, I've only know how to reset network settings so i can sent out green messages or use my internet or make wifi workable again. What is the real issue that Apple is probably aware of, but not telling us or fixing it ? My guess, is that QUALCOMM is not sharing their modem source code, so apple is not able to optimize Qualcomm X series modems on their IOS as much as they wish?!