Disagree. I wasn’t young and I did know how to play and I was very competitive (Vanilla Marshal rank 12).
We regularly used to face pre-mades … Horde twink teams full of rank 12-14 enemies with raid gear.
We did what must always be done if you wish to succeed in WoW PvP. Fight fire with fire.
I ran with an Emerald Dream pre-made that included ranks 12, 13 and 14 and we were on voice comms. The times when we fought the Horde teams with the same ranks also on voice comms were epic.
Sure it depends on server and on you, but on Emerald Dream at least the PvP scene was extremely competitive back in the old days. We hated the Horde and the Horde hated us. This was of course in the days before Realm merging when all the players were from your Realm, so you knew them all and developed serious rivalries. Reputations were on the line. It was personal. It was WAR.
I loved it. But it definitely wasn’t ‘chill and casual’ on my server.