Upgraded to new modem, but same slow wifi issues remain

So i was able to reconnect my doorbell in one step, but i keep failing with my roof mounted camera. I can push the button on the back of the camera until the light flashes white and gives off the temporary alarmxxox wifi signal. I can connect my phone to that just fine. I just keep failing in the last step where i try to connect my camera to my home wifi network. I may have to get a technician out to tackle that unless there are some other methods to try.