I've not seen it so much with Huel, but pretty much nobody likes 'lents on their first try. The texture is odd and the flavour can seem overly subtle and not quite what you're expecting (especially if you've been used to sickly sweet protein shakes).
Usually improves quickly though and within a few meals you'll be enjoying it. Definitely look at flavours though. I've tried using nesquik myself and it just didn't work out at all. Using a blender and adding whole fruits like banana works pretty well and I've got a lot of time for Huel's own pineapple & coconut, mocha, and rhubarb and custard flavour packs.
A fresh cup of coffee (from ground beans, not instant) mixed with milk and a few scoops of huel is also absolutely superb. You'll want to leave it in the fridge overnight but man, great way to start the day.
Keep at it, just takes a bit of getting used to at first