From your own source:
However, model biases could play a critical role (McGregor et al., 2018) in explaining why coupled models are not able to simulate the observed SST pattern during the hiatus (Coats & Karnauskas, 2017; McGregor et al., 2014). We thus caution that consistency between AGCM simulations and observations at interannual timescales is not a guarantee of success in projecting future climate, as other processes operating at longer timescales likely also matter.
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IOW, the models bias toward AGW and that makes them inaccurate.