The Integrated Sachs-Wolfe effect is cited as independent gravitational evidence for dark energy through CMB-galaxy cross-correlations. This paper demonstrates that this claim fails internally: the stacked ISW signal from supervoids and superclusters identified in SDSS, BOSS, DES, and eBOSS data is consistently 4 to 10 times larger than Lambda-CDM predicts from its own parameters - a discrepancy confirmed across independent surveys over fifteen years with no resolution. Under BFUT, the CMB temperature correlation with large-scale structure is the natural present-moment signature of a Spaticle field whose local temperature tracks matter density, requiring no dark energy and no decaying gravitational potentials. Proof-of-concept simulations reproduce the Granett et al. observed amplitude of 9.86 microkelvin for supercluster-scale density contrasts, compared to the Lambda-CDM prediction of 1 to 2 microkelvin. A second simulation demonstrates environment dependence of 11.24 microkelvin span from the same structure across different cosmic-web settings, while Lambda-CDM predicts zero environment dependence.
V. K. Sharma (Fri,) studied this question.