Slow performance on representing select bytea column query of table in PostgreSQL

Is it possible to improve representing data to client when they send command select bytea from table limit 150;. It consumes one minute and half but in pg_activity I see "client_write" waiting event. we use 10gbit network. DB version is PostgreSQL 13. When I create a table from that result, it has 285 MB table size. Oddly, select count(*) from (select bytea from table) only takes 10 ms. Is there any tip or a way to improve representing performance?