How to say "我认为这都是无用功" (wǒ rèn wéi zhè dōu shì wú yòng gōng) in Chinese dialogue

rènwéizhèdōushìyònggōng

I think it would be a waste of time.

Idioms & Colloquial Expressions
Grammar Patterns
INTERACTIVE SCRIPT TIMELINE
LINE 0132:30
dàn
shì
àn
zhào
jīng
yàn

But based on experience,

LINE 0232:32
PLAYING SCENE
rèn
wéi
zhè
dōu
shì
yòng
gōng

I think it would be a waste of time.

LINE 0332:34
zhè
shì

This case

Show Information
Source MediaTV Series
Season & EpisodeS1 E7
Timestamp32:32
TMDB ID309663