Which GoPro® Camera do you like better, Hero5 or Hero4?

I’m disappointed in the Hero5 Black and Hero5 Sessions cameras. I know how to operated these cameras. But sometimes they do their own thing. Having problems with them such as:
Hero5 Black:
1. Powering on by its self and running the battery out.
2. Voice control is useless in a noisy out of doors environment.
3. Sometimes it gets stuck in one mode and have to pull the battery to reset and operate.
3. Poor/weird sound quality.
Hero5 Sessions:
1. Gets stuck in a continuous loop and won’t do anything until after it runs out of power and it is recharged. (battery not removable).
2. Once it overheated (too hot to handle) while charging.

I’ve had no problems with the Hero4 Black cameras. I think that the GoPro 4 is better than the GoPro5’s (just a pain).

What is your opinion?

Also:
Have you tried the GoPro6’s? Do you like them better than the GoPro5?