I rode an all dayer there back in October on a 32lb hardtail setup 1×9 with a 32T ring and an 11-32T cassette. I struggled… A lot!
I rode there last weekend on an all dayer, riding lots of the same trails, on my 28lb full sus bike with full 3×10 XT setup (including 24/36 lowest gear ratio), and I still struggled… But probably slightly less so.
Some of the climbs in the Quantocks are steep, and most of them are pretty long. I know people that can singlespeed it though, so everything is relative, but it’s the kind of place you want to give yourself as much advantage as possible when it comes to gearing IMO.