Muscadet is treated with disdain even in france so dont worry about it 🙂
In france it’s primarily served with fresh shellfish or seafood, particularly Brittany (it’s a Loire wine, down the Nantaise end near the Atlantic coast). The grapes are not ones that develop many flavours (two, maybe three key varieties in Muscadet AOC, IIRC correctino, only the one: Melon de Bourgogne ) so it’s never classed as a fine wine.
Because of this, youll often end up drinking it when you buy a cheap “Own brand ” table wine with no AOC denomination, but of course thats no help if you’re out to find Muscadet in the first place.
Morrisions currently have a passable one which Ive had half a dozen bottles of recently. Not “great”, but great is relative when it comes to Muscadet.
Never pay much for Muscadet, its almost impossible to find a bottle over €10 in France.