Well, I’m giving it a go. I got a book, It’s Not Fair by Eloise Rickman, a general intro to youthlib I thought was pretty good (although it doesn’t go as far as most of us here would like). I told my brother I thought he should read it, partly because I think he’ll generally be on board, but also because his older son (9 years old now) is a lot like me, and I worry about him having the same problems I did. I always hated how powerless adults made me feel, and I see my nephew doing the same thing. Felt pretty awkward, but he agreed with the assessment and appreciated the recommendation. So we’ll see what he has to say, I guess.
Everyone has their own preferences, and even toddlers are too old for some people. It’s kind of shitty if someone just said outright that you’re too old, but bear in mind they were only speaking for themselves. You’ve still got plenty of other options.
In any case, welcome.