Studying galaxy evolution at the cluster and protocluster scale plays a crucial role in unraveling the intricate interplay between large-scale structure and internal galaxy processes. We present a multi-wavelength analysis of a protocluster at redshift z=2.3, which provides a unique opportunity to investigate the evolution of galaxies at a cosmic epoch of enhanced star formation and where environmental effects are most significant. Leveraging extensive data spanning the near-infrared to the ultraviolet, we uncover complex morphological and kinematical features of the extended gas in Lyman alpha, C IV, and He II associated with the protocluster and a remarkably high local density of AGN activity. These observations suggest ongoing feedback processes between AGNs and the surrounding gas, as well as an intricate formation process of the circum-galactic gas within the context of large-scale structures. Our study highlights the need for state-of-the-art theoretical interpretations of the interaction between galaxies and their surrounding gas up to intergalactic scales, as well as serving as a precursor to future large surveys targeting a statistical sample of galaxies that will revolutionize our understanding of galaxy evolution in the cosmic landscape.