I didn’t watch Hollywood’s version of the movie, Noah. But I’ve read about their false representation of God, portraying Him as a mean and cruel God.
The reality, however, is: Although our holy God and Judge won’t tolerate rebellious sinners forever, He is also long-suffering and extremely patient.
For an entire century, God used Noah—as he obediently finished the ark—to warn people of the coming worldwide flood and to turn from their wickedness (1 Peter 3:20; 2 Peter 2:6; Luke 17:26, 27).
God desires a relationship with us, but He gives us free will. He’s a gentleman and won’t force Himself on anyone.
Because Noah walked with God and demonstrated his faith through obedience, God delighted in having fellowship with him. The Bible records God speaking to Noah seven times, each time in blessing and/or fellowship (Gen. 6:13; 7:1; 8:15; 9:1, 8, 12, 17).
This contrasts with Psalm 29, which speaks of the flood. Here the “voice of the Lord” thunders seven times in judgment and majesty before those who have turned their backs on Him. This also corresponds to the “seven thunders” and their “voices” that will be uttered in the future judgment (Revelation 10:3, 4).
Time Frame of the Flood
Noah was 600 years old when the flood waters came upon the earth (7:6-9). This initiates the postdiluvian age.

Read Gen. 7 here: Bible Gateway
It’s significant that the Lord told Noah, “Come into the ark” instead of “Go”. For God would be with Noah and his family, keeping them safe just as He promised (6:18) long before they even chose to enter (7:7).
Just as God kept Noah and his family safe, we can also be assured that God will deliver us from certain coming judgment through a faith saving relationship in Jesus Christ (Jude 1:24).
Salvation is found in no one else, for there is no other name under heaven given to mankind by which we must be saved.” – Acts 4:12.