Why is that?
I'm curious as to why Axis is easier.
Having all "necessairy" units stock (rocket arty, panthers/heavy tank) means commander choice isn't nearly as critical , linear teching means there's less noob traps (ost)
Micro is weak, so allied TDs (which you need to kite with) usually die very quickly, Panthers meanwhile are tough, and have heavy crush (so they don't get stuck on stuff because of pathing problems, so they are much easier to keep alive for weaker players.
Everything is farily straightforward, and not very gimmicky, get a pair of MG42, point them roughly at the enemy, then a pair of mortars behind them and you're set
This also comes from my personal experience, when introducing new players into the game, they usually find Ost the easiest to play.