Grandmaster…
I have no clue what you are talking about, and clearly, neither do you.
NOBODY on a religious kibbuts “runs around in their bathing suit all week” NOR DO THEY “l’kovod Shabbos” they put on a Gucci T-Shirt and shorts”.
What an absolutely ridiculous thing to say.
They wear their work clothes for work and their Shabbat clothes for Shabbat.
Why do you think everyone has to agree with YOUR idea of what is appropriate?
I think Yerushalmim who wear a gold kapota and a streimel on Shabbas would think YOU are inappropriately dressed in a goyish-style suit.