Why not let ST fans decide that? The games reflect their time and place. It's natural that they don't look as attractive today, but does ZX Spectrum or 2600 games? No and they still can playable and fun if programmed well. Retro gaming is not all about eye candy.
According to professional journalists up to summer 1989 Amiga games were rarely seen that much superior, because it was playability that counted. I've compiled hundreds of review scores for that subject. Sometimes leading magazines even gave worse score for Amiga versions, because they didn't use the extra hardware. Not to mention Amiga games by Ocean were usually 5 pounds more expensive making them even less worth the asking price until things changed in the 89/90 when it became the lead platform and got cheap enough that people actually had money to buy one with a Ram expansion.
Someone had to lead the way in the early 16bit days to make "next gen" games like Dungeon Master, Carrier Command or Universal Military Simulator. It happened to be Atari's hardware which still is a tough bite for some people to swallow.
Sure it didn't perform well in arcade conversions due to lack of gaming hardware, but there were lot of great games for the older audience.
Even Retro Gamer mentioned Atari three times in their article of 50 things that changed gaming, while Amiga, as great as it's hardware is, didn't get a mention at all. It's not always about superiority of the hardware, but the time and place when things actually happened. If it were, most games would have been written for Acorn Archimedes.
YouTube videos are just games in attract mode. Like a car that can't be driven from the passenger seat. You can only admire scenery, but have no idea how it handles.