War Arenas the wrong place to look for a 1 on 1.
You could try to defend EW and MW sites against milk runners. You can take the LW arenas for what they are. You could wing up in LW arenas with a few other and clean out the furballs.
You can go to the DA. You can participate in the SEA events and KoTH (pretty good fights in KoTH, though they may not be the planes you like) - usually 1 on 1 fights there.... few gangs.
You've got a internet full of twitch kitties infesting online games. Why do you think you see so many in LW with their Runstangs, L-gays, Splixteens, Nik-dweebs, and Cannon-Hawgs? Everything ENY 10 or less? They get tunnel vision, have not worked on any skilz, head straight in, spray and pray, look for the pick, and run when things go bad to save what little self esteem they have left.
A 1 on 1 was a rare thing in WWII, and it is a rare thing in AHII, although for different reasons.
We can hope for chivalry and courtesy, but don't expect it. You can try to take noob pilots under your (or a squads) wings, to teach.... but I've not seen a lot of that. You can post all you want in these boards all you want about these subjects; but less than 10% of the online population comes to these boards. You can complain about in on channel 200 in-game, but only those playing will see it, and others will jump and flame you for it.
As to hordes. Put that down to mob mentality and common human desire to be on "winning" or "dominating" side. I can't really complain about it, since it is pretty difficult to herd these AHII cats and kittens to do ANYTHING together as a group in the first place, so to those that still put together missions and get people to join. I'll defend against these until the base is capped, then come in from another base looking to engage the ant trail and BOLO for the goon.
Just worry about your own personal conduct in the game.
If it's 6 on 1, break off, and look for the other side's cherry picker.
If it's a 1 on 1, ask if friendly needs help, or just fly his wingman position, don't take the shot.
Don't fire past friendlies while chasing a target (as often as I see the 3rd or 4th plane back in conga line doing that.....).
If I'm in a B-26 or A-20, and that Niki tries a HO me.... I'll accept (and giggle like a little girl when I dissect his ride out from under him).
Check Six whenever possible (you've got to see it to call it.... some victims don't get this part when they complain about not getting a 6 call).
Don't complain when you don't get a 6 call (yes, you were probably just "bait" to "friendlies", but you've got to watch your rear if not flying with a wingman, no one else's responsibility).
a good fight - win or lose.
Have fun.