Your best bet is to get a pixel 6a and flash CalyxOS on it, there is no way you're getting a modern brand new phone (which is what I gathered from other comments), with these requirements. Calyx gets rid of everything you'd call "more garbage", comes with all the tools you'd need for a secure phone and allows you to disable access to hardware such as the microphone and camera. I also read you didn't want custom ROMs.

Here's the deal, any phone made by a company with more employees than two is going to have some sort of data collection in it, if you want a phone that doesn't have any, either get a Linux phone (which won't do anything you want it to) or a pixel with a security and privacy oriented rom on it. Some other options are lineageOS, comes with opt-in data collection, not opt-out, has years of security updates and supports a great deal of modern phones, doesn't come with Google apps by default and if you want, you can disable internet access to apps individually, grapheneOS also exists, similar to CalyxOS. If none of this is good enough for you, then idk what to tell you, but you're not going to find what you're looking for exactly.

The modern android world can't give you a high end 16:9 60hz phone with 2gb of ram, no front camera and 8 hours of screen on time and official security and feature updates for 8 years, that's simply not how it works anymore, you can say you want something like that, but unless you make it yourself it's not going to appear out of thin air.

I hope this post wasn't too rude, but with requirements like these you're setting yourself up for disappointment, I made this post to make you realise how impossible this actually is.

Oh and for DS games, crazy idea, buy a DSi and install unlaunch on it, it'll launch any DS game you want and it'll cost you 40 USD at most