If you go on journalist twitter, the “mainstream media” is full of very enterprising journalists who have done deep dives into the security law (as much as released by the CCP...) and is uniformly critical.
Also rather than “online polls”, the more damning feature are the local elections, or remnants thereof, where the Beijing faction is routinely getting crushed with pro-democracy candidates getting 70-80% Of the vote
In the last local council elections, pro-Beijing candidates got 42% of all votes, while pro-democracy candidates got 57%. That the pro-democracy candidates won almost 90% of the seats is an artifact of the election system, which doesn't guarantee proportional representation.
Also rather than “online polls”, the more damning feature are the local elections, or remnants thereof, where the Beijing faction is routinely getting crushed with pro-democracy candidates getting 70-80% Of the vote