Cant beat the necrons deck using the tyranid deck in 1v1..any tips ? | tcgmode

We play commander with the 4 warhammer 40k precons and the tyranid deck is always the weakest one even when changing to the secondary commander and whenever i play 1v1 against my friends using the necrons deck (him) i lose hard (me tyranids) &#x200B; i dont have that much experience in mag...