It's simple. All predictions and models have failed to date. They have 1000+ climate models, and every couple years take and promote the best performing ones to give the illusion of credibility. In reality, past performance is not an indicator of future performance.
A more simplistic gold standard approach says just look at sea level rise, and it's relatively flat at about 3mm per year, or a foot per century.
The entire climate industry relies on unproven, highly speculative feedback loops that unsuccessfully attempt to model the effects of moisture in the air.