in my experience modern “dumbphones” are still just smartphones with bad hardware.
what actually helped me with phone usage and doomscrolling was completely deleting all mainstream/algorithmic social media, being extremely aggressive about blocking problematic domains with DNS (so it can apply to all my devices, not just my smartphone), rejecting unnecessary apps, limiting notifications to only specific people/times, etc.
tl;dr being mindful and intentional about how you use all technology will have a bigger impact than just replacing your phone with a different one :)
im a 90s zoomer cusper and we used vhs well into the mid 2000s. its not just millenials or gen x.
probably half our vhs tapes were recordings of tv broadcasts or other tapes. the one i remember most was a recording of rankin-bass rudolph, commercial breaks and all. (and it technically isnt piracy, as the US supreme court determined in 1984 that private home recordings counted as fair use.)