Forgive me for assuming you’ve only been reading a handful of years based on your registration date. I think everyone gets up to speed with it and finds less to read as topic familiarity, muscle memory, knowledge of community tropes matures. Everyone is different as far as how many articles will interest them. If you joined when a topic that greatly interested you was popular, then you’re especially going to feel that falloff. Regardless, there must still be many stories of the type that interest you. My recommendations are to slow down reading a bit, so you see more new stories when you read HN, and to subscribe to something like Hacker Newsletter that’ll pull together the most interesting stories every few days.

Individual account signup date is an unreliable proxy for lifetime HN experience :^)

Further, https://news.ycombinator.com/item?id=47340079 suggests HN is facing a sea change unlike any past fad (Big Data, VR/AR, NFT, Web3, ...). Due to Brandolini's law, it cannot simply be disregarded with the "semi-noob illusion as old as the hills" cudgel.