I mean, you are excused for not playing years since Lordaeron came out, but it's still largely a "YOU" problem than a problem of the server. Asking for an entire system to be readjusted just so you can get a "fairer" start is ridiculously entitled and most likely, won't happen.
Before cross-realm got enabled, there were PLEAS on these very forums to do something to revive PVP on Lordaeron since it was absolutely DEAD.
As far as arenas go, low-geared Icecrown players deal with BIS characters as well when they try to climb. Suck it up, deal with it, take your 10 weekly losses, get your minimal AP, buy relentless and have a higher chance of not dying next week.
Oh I actually made a post like that. I wanted matchmaking back in the day where high-geared are only put against high-geared. They did, that, kinda, sorta. So I'm pleased.