Yeah, the start-up can be atrocious on low-end smart TVs. I had a Samsung that I more often than not would turn off before it turned on, because I thought it hadn't registered the input from the on/off button.
And as salt in the wound, turning off takes like 10 seconds.
Hahaha. I dug into the setting on my newish tv and found an option for the tv to make a little chime when turned on and off. It is so nice because the sound will play right away even if the tv hasnt visibly started to turn on/off yet. It's the only thing that saves me from hitting power multiple times and being unsure what state the tv is in.
And as salt in the wound, turning off takes like 10 seconds.