it is true that it was a big mistake by trying to wrath a belus. but that situation can be recovered easily especially when antilla's sp gen already activated once.
the one move that lost him the game is to send out sakura to kill belus. sakura is a hit and die unit and is LP-expensive. Alot of alteil players doesn't realise that at all. He should have instead sent out dilate first, then send out sakura, not the other way round. but according to my judgement, sakura should not even be sent out at all under that situation because he already made a huge mistake (to wrath belus) and it is extremely unwise to send out sakura at all which locks up 5 sp for at least 2 more turns. (comeback is hardly possible if you do this)