True, there really is no meta on this game pvp. The diversity of the game heroes with their skill & aura allows ppl to experiments with every squad combination.prestige 2 here and been playing for around 2 month,
and still can get the champion rank milestone,
and every week still can enter the top 70 rank.
just can't get to the top 50 rank without buying orb.
since my winrate still at around 90%,
the important thing is to focus your build on the units that you have,
there are many squad buildup in this game,
you can see the top arena player,
there is no single meta in arena,
because this game arena systems didn't rely on auto battle,
but we can play it manually,
so the squad buildup have to match our playstyle.
keep battling and keep learning about the strategy for the arena especially the enemy AI movement
and also keep upgrading your equipment and rune,
that is very important for your character growth,
I've also played this game for 2 months started November 4th, 0 lvl prestige, havent invest a single penny on this game, yet I can still climb up to Champion milestone last season.

Its understanable how difficult and frustating it is at first month / few weeks of trying to climb up, It happened to me also thats why i have tons of losses at arena. Just try to be patience until you get a perfect squad for arena everything takes time to progress.