Arenas - Loss forgiveness not working properly
From here
https://www.ea.com/games/apex-legends/news/arenas-ranked
Similar to Ranked BR, we want to maintain competitive integrity in Ranked Arenas. Players that abandon a Ranked Arenas match will be hit with a temporary matchmaking ban and will be unable to queue for Ranked Arenas until the ban is over. Along with this, if you have a teammate that abandons you, you will receive loss forgiveness for that match. With loss forgiveness, you won’t lose any AP and at worst will earn 0 AP for that match.
I had teammate who did not participate at all for 2 rounds. He was sitting in base and he had red sign on his icon. Game did not kick him out for inactivity. I received -AP just like if he was there playing with us. If we have to play 2 full round (it would be more if game countinued) 2 vs 3 that is huge disadvantage.
Please look into AFK and kick out for inactivity timers for Arena mode. They need some ajustments for sure.
I understand that you don't want to kick player out because he might come back and help us, but in my opinuon 1 full round of non participation is already too much.