Creatine is probably the most well-studied nutritional supplement we have, and one of the most efficacious. You are presenting a single study to counter that. Not even a meta-analysis, but a single study of just 54 participants who did not exercise at all previously (from the study; "Apparently healthy individuals, with a body mass index of ≤30 kg/m2 and not meeting current physical activity guidelines of at least 150 min of moderate-intensity exercise were included. Individuals who undertook [resistance training] within the previous 12 months were excluded"). The general consensus is that it is absolutely helpful in muscle-building. See, for example [0] and [1]. Beware the man of one study. https://slatestarcodex.com/2014/12/12/beware-the-man-of-one-...

[0]: https://pmc.ncbi.nlm.nih.gov/articles/PMC12665265/ - Meta analysis results; "after intervention, the Cr group exhibited significant strength gains"

[1]: https://www.mdpi.com/2072-6643/17/17/2748 - "A total of 69 studies with 1937 participants were included for analysis. Creatine plus resistance training produced small but statistically significant improvements... when compared to the placebo."