I'd very much like to play games, but quite frankly you sold us a device that doesn't fully work and wasn't properly tested. Now I'm out 270EUR and wonder if I'll get my issue solved. What I have now looks & sounds so poor that I'd never want to use it. The people here are doing the testing and analysing that you should've done before you sold it. I'm sure many of them would've given you their expert advice free of charge if you just consulted them before you finalised your design.
You keep saying that there is some big difference between US/EU. Not really. It's true that us Europeans were blessed with SCART inputs for a long time, but those days are long over. 2017 LG OLEDs even removed the component inputs here. If you want to use old consoles on a current TV, you pretty much need an OSSC/FM type device. If you want quality, you've been needing those for years as most TVs handle 240p somewhere between not-at-all and poorly (lag, bad scaling, misinterpreting it as 480i, etc.). There's nothing super outlandish about hooking up your console with a csync cable to an OSSC.
It's pretty clear that you guys are not particular into video stuff. Your product box featuring 16:9 stretched images of your 4:3 menu tells me a lot about how much you think about stuff like that
I hope you got a bit of an understanding that a lot of your customer base deeply cares about these issues. If you have ten consoles all perfectly modded, cabled up and calibrated through your video processor of choice you don't want to add an 11th system that will forever be the 'bad looking one'.
I personally just wanted to play some damn Magical Chase and Military Madness. I have plenty of intellectual curiosity about the technology behind all this, but I'd rather spend my evenings playing games than debugging ground loops or staring at suspiciously wired cables.
And since you asked, I spend the 90s playing games on a PC with a high-end CRT monitor since I always hated the blurry, flickery, scanline look of consumer TVs & consoles. Only got into older systems once they started to have sharp pixels like on the box art
Please don't kill me 90s CRT people