Weird things on my 5X; Can anyone help?

Weird things on my 5X; Can anyone help?

I've got a 5X that I use with Verizon. I have had it updated to Oreo. (Why do I always regret OS updates?!?!)

Now that Washington is hands free state, like can't even hold phone, I use Google Assistant more.

1) Something that has always happened, even before OS update, when Google tries to make a call in Google Hangouts Dialer it pulls the number up and then it disappears. (I realize this may be an app issue and not a phone issue.) I use Google Hangouts Dialer so I can make calls over Wi-Fi at home as service is always iffy.

2) And the other annoying part is...how do I improve the Google Assistant? I swear there was one time I was driving and it was like America's Funniest Videos. Google: "What would you like the [text] message to say?" Me: Says Message and appears on screen and then disappears. Google: "What would you like the message to say?", this went on a few times. Or Google: "Would you like to send or change this message?" Me: "Send. Send it. Send" Google: does google search for "Send it" and video appears on screen.

3) My phone gets so hot sometimes that it doesn't respond to finger print or even just a touch on the screen.

4) Or sometimes (like last night) I hit the home button and everything disappears. All I see is my wallpaper. No icons, or anything. This has happened but usually not for so long. A minute or so before a crash notification of FB appears.

I restart my phone, almost daily now. I had downloaded Word Cookies but just removed it to see if that helps. I've got about 8 GB left of memory.

I am seriously considering getting a new phone and I really don't want to! (I got the phone in January!!)