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Not at all.
Externally it's 2m x 1.06 and internally it's about 1.80m x 0.90m. The toilet cistern is the smallest one I could find, the frame itself only takes up 90mm but needed about 50mm more for the soil pipe. (edit - added extra 0 by mistake for these)
When I sketched all out and even when I physically laid it out I thought it might be tight but the proportions fell great, nothing feels cramped or compromised. I reckon you could lose 30cm of length and it would still work, wouldn't be as comfortable but would definitely be functional.
Would you mind sharing the dimensions of this room?