1st:
This is something desirable.
PLAYER SKILL should matter in a PvP game. Now, SBMM would be ideal or at least a ranked mode to avoid situations where you stomp a lobby and it feels dirty, or situations where the enemy team is sitting above your airfield and farming planes taking off.
None the less, PLAYER SKILL meaning one player consistently outperforms another player either in a mirror match-up, or a fair assymetric match-up is a GOOD THING.
AAB/ARB are a mess using controller, yes.
However, one of the ASB streamers I watch consistently literally plays on an XBOX controller and does quite well. It does take configuration - the default settings are utterly horrid for controller, mouse joystick and real flightstick. Do note: Mouse joystick, not mouse aim. There’s a world of difference.
I do concede people with certain hardware have a out-of-match advantage that is not personal skill/strategy/teamwork (VR, head tracking). However, it is not something created by gaijin or the game itself, just a consequence of “flying a plane in first person and needing 3D awareness.” Their dedicated first person flight game, Aces of Thunder seems to seek to solve this by requiring VR by default.
This a legitimate issue and there should be better server availability for oceania/eastern asia.
This sounds like a control issue. New players coming into Full-real controls using Mouse joystick run into the same issue. For mouse joystick, the solution is to move from “simplified” (it keeps your plane level and max aileron input only gives 90 degree bank rather than inversion and pitching up is not allowed beyond some 80 degrees) to “standard.” This does mean Y axis becomes inverted.
For x-box controller, I imagine the issue has to be something similar or the instructor getting in the way if using it in RB.
ANYHOW
Player skill giving consistent advantage = Good.
Server location giving disadvantage = Not good.
Gaijin-developed and implemented features that favour one side even in a mirror match up = No respectable PvP game does this, not even freemium models (MWO, LoL).
Player hardware giving an advantage = Not ideal, but such does persist even in pinnacles of E-sport balancing like Dota 2. Furthermore, a lot of hardware differences can be compensated and equalized with proper set-up and mindful practice until that set-up feels second nature.