On top of that, its harvesting the hell out of your data.
Stop being a sucker. Toss that Roku powered shit out of the window.
2-3 second boot up. No ads. Snappy interface. No complaints. No bloatware. No adware.
Why does this solution not work for you?
Does your TV not work when you turn off WiFi with an attached Apple TV? I’m confused.
Roku is breaking things constantly. If you ever have to replace that hardware, it will have more up to date software and your experience will be broken. This will be by design.
Even implying that somebody should consider buying Roku hardware at this point is stunningly irresponsible. In the last few weeks they broke HDR. Before that they broke the ability of their TVs to display content properly when using apps on the built-in OS due to some new craptacular frame rate feature they pushed out and have refused to roll back. Thankfully I can work around it on my Apple TV by turning on Game Mode for the input. They are currently testing a wide variety of invasive ad features that you can be damn sure will destroy your experience once they officially roll them out.
They harvest every bit of your data and sell it to whomever will pay.
Roku is a stunningly objectionable company. On top of all that (as if it wasn't enough), their platform lags behind everybody else. They refuse to license a full range of video codecs so pieces of software like Channels DVR will never work on their platform. Not to mention that when you run a Roku TV that isn't connected to the Internet, you lose the ability to customize various aspects of it. You can't rename the inputs for example.
Nobody should ever even imply that somebody should buy a Roku device. They are crap and there is virtually no chance of the company changing course.
They are a poster child for enshittification.
From day 1, all smart TVs had horrible latency when it comes to navigating through menus and screens. I'm glad for that, because it stopped me from ever buying one in the first place!
Maybe it's the people that show up at best buy without doing any research and just buy the most expensive TV not realizing it's a crappy smart TV. Who knows. Do your research!
I use a Frame and don't have any of the issues you describe in the slightest.
The power button turns the TV on with a 0.5 second animation, and immediately I see the Roku interface with no popups or Samsung branding or anything.
Probably the ONLY complaint is that by default my washing machine puts an alert on the TV every time it's finished.
I would probably find the setting to turn it off but honestly part of me finds it very cool for my washer to creep onto the TV because it knows I'm watching.
EDIT: maybe you are using wifi? It's the only thing I can think might be different in my setup. Try running RJ45 and see what happens? All I can say is Works On My Machine unless you add some details