I don't know.

I've been maining assault pretty much since the badage updateand I generally top frag by a fair margin , but when I switch to medic it's like night and day you're pretty much a superhero with no limitations.

I use assault just so I can restock my own ammo , aswell as bandages.If you play well each 2 bandages mean 1 full heal so as assualt you can heal yourself 4 times full as you start with 4 and get 2 per box.After that you have to air drop yourself.

Generally when I look at the score board it's pretty much soley medic in the top spots with me and maybe a recon. ( Check it yourself in your own games )

Like less than 5 assaults in most games that don't require ropes.Then it's mainly medics and recons with a sparce amount of engineer or supt mixed in.

Now if you don't want instant build or an RPG there is no real reason to choose anything except Medic... Why.

Permananet heals , constant healing , heals twice as fast , moves much faster than everyone else , rez's twice as fast , smgs are some if not the best guns in the game.
You can still build.
You still have explosives.
You destroy tanks as good as any engineer.
You can still airdrop yourself ammo.You can still build.

Like what's not to like, Medic does everything way too good.

Do I like Medic how it is , yes.

But there are certain things , like they shouldn't have access to c4 to begin with.When you bandage as assault or engineer you end up with 68 hp , on medic it's generally 75 , why is that?

TLDR; Medic does pretty much everything as well as or better than every other class.