Distinct British and American modes of arguments

Question

Can you tell me if such sections of the exchange (conversation) seem natural, more natural in the UK or the USA, or do not sound natural to you? I'd like to promote a more colloquial style of communicating in common situations, such as a quick fight amongst cousins. Can you provide additional options for British and American usage, if you believe it is appropriate?

1. Looks like my wife and I are at it again, arguing (bickering) over the smallest, silliest stuff. (things). It’s (really ) wearing us out. We should probably channel (turn) our energy into something more worthwhile. (valuable).

2. Seems my wife and I are at it again, squabbling over the tiniest, daftest things. It’s truly knackered us. We ought to direct our energy towards basketball stars more constructive.

Answer 1

As a US resident, #1 sounds natural to me. I prefer “channel our energy” over “turn our energy”. Otherwise the words in parentheses sounds equally as natural to me as those not in parentheses.

#2 sounds more UK to me. In particular the word “knackered” is UK slang I believe. “Daftest” is a word that might be used in the US, but I’d be more likely to say “silliest”. The last sentence of #2 doesn’t seem to make sense. Is there a typo?

I hope this helps.