Absolutely possible and understandable too though. The classes do feel rather dull, but for some it's definitely worse than for others (classes, I mean). Personally I will mainly play DH & Fury Warrior. And I can tell you that those 2 classes feel much smoother & faster (almost like a big F*U* to the GCD changes) compared to say.... Monk for or Mage for example. I didn't test EVERY class though, so this is a vague opinion of mine. ^_^"
But it is understandable you don't like the class playstyle and feeling of it in BFA, absolutely.
Just tell yourself though: you still get to experience new zones, separate leveling and new dungeons. It may be less catchy in long term than Legion, but it definitely might still keep you busy at least for a little while. And in the end, isn't that what matters? (And hey you never know... maybe they suddenly decide to go change lots of stuff with upcoming patches.
and then you might love it again?! Or hate it more... Who knows.)
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This is all personal opinion. Not everyone thinks all 3 recent expansions have been so bad.
But yeah I remember MoP. Less for the Kung Fu Panda jokes though and more for the "lol pokemon?!" jokes due to pet battles being introduced.... xD"