Real-debrid is already doing what a VPN does for you - it downloads the files on your behalf then sends them to you via an encrypted connection. Your ISP will see you’re downloading from RD, but they won’t know what. If you’re doing regular torrenting via another client then of course use a VPN, but it’s not necessary with solely Torrentio+RD.
In no way was it trying to mimic games like devil may cry, 90% of the focus was on the narrative & psychological horror. If you were looking for more engaging gameplay that's fine obviously, but I think your expectations for what this game was got misled somewhere.