I have close to 700 hours, most in air, and my experience is as follows:
air ab: most of the times I get 9 or more kills in a match more or less effortlessly, but it's mindless and gets dull since maps with a varied and interesting airspace like the top of the world are rare and it's just a game of whose team climbs and proceeds to spawnrape.
air rb: 5 minutes of dead air air and being strafed by premium planes and us/germany superprops that can climb faster and are better than you at most things. Wanted to fly oddball vehicles like j7w that are supposed to excel at top speed and climb? Fuck you, eat shit.
top tier jet air ab: nobody plays it, japan suffers from no lineup
top tier jet air rb: suffer because you don't have sidewinders and are stock, then suffer because you unlocked a plane that became a bottom tier years ago like t2.
ground ab: die instantly whenever you peek out because everyone sees everyone at all time and the guns are instantly pointed at you. the crosshair makes the experience an exercise in mouseclick, and they likely know better spots to camp than you.
ground rb: drive around aimlessly for minutes, still die whenever you so much as peek out because every other tryhard with thousands of hours that there is (literally every player) plays at ultra low quality (graphics mode that removes a lot of visual obstacles, giving an advantage), is expert at compensating for drop and knows all the map. I got to t-34-85 d-5t and run a lineup with this and asu-57. I literally shot german tanks and td's 4-5 times at 500 meters and they didn't get a scratch, while they so much as plinked at me and i'm toast.
Overall this game is 1 mediocre match and 10 absolutely depressing soul crushing matches that make you question your proficiency at life itself. I'm not even bad, I frequently get 1st or 2nd place at titanfall 2. But it's the only game where I can drive and fly historical vehicles without buying a flightstick and shilling out a fortune for a single plane.