Maybe your playing style with Freaks in terms of pilling is bad. Also it really matters what your half deck for your freak deck+the other clan.
The current meta this week is Freaks(any week when Bogdan isn't banned the deck is top tier), Sakrohm, GHEIST
also great decks to mix with Freaks this week since that is what you're using is Ulu Watu, Sakrohm. Pretty much any clan with a good boss card and a DR is a viable half deck to use with Freaks.
Personally I'm using Mono Sentianl this week because I love it against the Freaks, Sakrohm, and GHEIST matchup as I tear through it easily
To be perfectly honest, unless you're using a pauper deck just about anything is going to get you to 1300. Rather than focusing on improving your deck, you should first reassess how you play before deciding that the deck is the problem. There's more to using Freaks than 6 pilling or nothing.
That being said, during a week like this where Freaks, Rescue, and GHEIST are everywhere Piranas are a strong choice, and are relatively low risk. They only really lose to decks with a lot of DR and one nuke. Aside from that, high damage from other clans like Uppers or FPC get below the Freaks minimum so they have to be wary of how many pills they use round one.