Can you go down a league?

I just got to master league but lose a lot now because I don’t have the best Zarkadions. Is there a number of consecutive losses where you get downgraded?

3 loss in a row is downgrade , 3 wins in a row is promotion and 3 wins is Also an egg

Lose 3 times in a row and you will get back to Expert.

But when u now when 3 times then ur back in master

Is there anything higher than master ?