WiFi issues

I’ve had my TV for about a year now. Recently it disconnects itself from the wifi and says it's unable to connect. If I retype in the password it'll say it's wrong when I'm 100% certain it's right. Internet on every other device is working perfectly. This has been happening off and on for three months now and I’ve gotten so tired of unplugging/resetting/rebooting. I’m so sick of this issue and it’s only gotten worse lately to the point where no matter how many “tricks” I try it doesn’t connect. I’ve contacted Vizio support many times now and I’m about ready to give up.

Is there a permanent fix for this?