rank

hello guys.if i leave a server i wont take my xp or i will only loose the bonuses?

yea i would really like to know that , too

i mean whether you have to play the whole match till the end or not to
keep your unlocks

No you dont the bonuses may not go with you but unlocks will

I have found that if the game crashes, freezes, or otherwise ends abruptly, you will lose everything, including unlocks. If you leave the game from the menu, you keep all your unlocks but you do not get match bonuses.

This is probably due to the game only transmitting statistics to the hub once the game has ended or you formally leave the game from the menu.