Under The Volcano

Is it just me, or is this book kind of insufferable? I'll concede that there are several kinds of virtuosity on display, in the evocative descriptive details and the convoluted sentence structures, but isn't it a bit over-wrought and adolescent? I can imagine intensely poetic college aesthetes in England in the 20s or 30's writing like this, and seeing life like with such flowery pathos, but is this a novel by or for adults? I'm about 60 pages in and not sure I can keep going. Genuinely interested to hear your thoughts.