Poor writing and bad plot. The acting was not very well done either and simply made the issues even worse.
The people making this movie clearly forgot that it was called Godzilla, King of Monsters, not Humans; Escape from Monsters. You would get about 30 seconds of action with the monsters(Why were they called titans?) then soon as it was going to start with a good smash down it went back to the humans.
The ORCA was this device that can communicate with the monsters and seems to be able to control a few as well. At the start they introduce you to it's use with Mothra coming from a egg. The larval stage hatched, and as normal began moving about and causing damage to this underground base. A stupid woman runs out, shouting at the men to not shoot, one does once the monster keeps getting more agitated and the head man is ready to start a protocol. She says no so he stops it then lets her run out to the nine story tall monster. It rather mad by this point, so she begins to try and find the right frequency, which makes Mothra clam down even after quite a few wrong tires. {Let's just ignore the fact that most animals will get aggressive if confused) Mothra just remained there then some men break in and shoot all of Monarch's men and then abduct the woman and her daughter, and send out mothera on a rampage that end at a waterfall were it make a cocoon.
The woman turns out is working with a echo terrorist that wants to restore balance with nature and man.(But man is a part of nature) What does the woman do? Set King Gehidora and Rohdan on the loose.
Later the movie progresses thought many poor slow humans scenes and we get to King Gedorha moving about trying to find the "Alpha frequency) that is coming out from the ORCA . The woman runs of with it to make the big old monster chance after her rather than a helicopter. The movie starts SAD MUSIC. She looks up at King Gehdora and then you see a massive bright explosion. They try to make you fell bad for a MASS MURDERER, in the background all of Boston is leveled, same for almost every major city in the world because of the other 13 monsters that we only her about but never get to see. So yah, that was even more cringe inducing than the plot or writing, a woman that kill a billion people is some sort of hero. Yuck.
Other complaint are-
The ORCA controlling the monsters like its a really powerful remote control.
The few appearance of the other monsters.
Only about 12 minutes of actual Godzilla and monster fighting.
The super giant Monarch plane just cruising without loss of fuel, for days.
The jet fighter getting whipped out while this huge jet that is the size of ten battleships can move out of the way.
The acting was very poor and one seemed a bit more like reading off lines.
The $7 that was watched seeing this thing.