Yep, lots of people - not just with Huel either. Coming from a varied meal plate to a fairly monotone shake is a big jump and can take a bit of getting used to, so don’t panic just yet 
Complete Foods as a rule tend to be fairly neutral in flavour to stop people getting tired of them, that’s brilliant because it makes them easy to tweak, but also terrible if you don’t like the initial taste.
For my part I do all sorts to flavour Huel. I add fruit and blend it, use almond or coconut milk instead of water, add black coffee, green tea and lots more (not all at once of course).
Check out this thread, lots of tips to get you enjoying things