Why not build bigger dreadnoughts?

Not to mention they were shooting at Reapers WITH EARTH BEHIND THE REAPERS!!! Major no-no in combat since, you know Sir Isaac Newton and all.

most of the time it makes people stand down my friend. Sometimes it doesn't that's true but it is one of the uses for massively overpowered things.

Did not humanity colonize Terminus systems. Then they became rebel state? Except they accept all people who rebel. They probably got their own Dreadnought or so by now.

Ok I relooked it up and it is true the humans did not colonize the Terminus Systems for I see now that is the lawless region that contains the homeworlds of the Quarians, Vorcha, Batarians and the Volus.

The Batarians went "rogue" not because the council would not help them -it was actually in spite of the council not helping them. The council was not about not give an already greedy and aggressive species even more planets and or territory.

Territory that the Batarians had already taken by force when the Batarians took the independent colony founded by the Asari at the height of Batarian power in the human year 1913 (over 2 centuries before the games take place in 2180's). But they have also contested and fought Turian and Salarian colonies and research outpost in the region as well.

Why would the council races of the Asari, Turians and the Salarians who have suffered at the Batarians' hands want to help them further their aggressive agenda? This basically boils down to:
"Mommy he took my Planet and I want it back!"
"Then the planet is his. Learn to share"
Batarian gives death glare
*Thank you mother I am now Darth Vader*

Knowing they could not when against them; the Batarians began a propaganda campaign against humans. And thus began their other tactics of enslavement and guerrilla warfare against humans.

The Batarians knew they were not a match for the council backed Humans and angry and in spite of this they realized that they were not going to get their way this time as they had with previous colonies of the council races. They basically became the spurned son that no one wants. This lead them to blaming it all on the humans and makes humans the bane of their existence and thus all excuses for anything that goes wrong is human fault...... I hate how familiar this sounds.

No.
The Humans did not invade.
The Humans began to colonize on the fringes of the Terminus Systems (right at the edge) as had the Salarians, Turians and as the Asari had done.
A event that the Batarians saw as if the humans were invading their home star system which was still several light-years from and of these human colonies.

However unlike the other three who had conceded once the Batarians began to attack them (I mean the Asari one of the more powerful races let their colony be ANNEXED by the Batarians!) the humans fought back against the bully with no teeth.
Beating the Batarains WITHOUT any support from the council or even the alliance at the time.
These human colonies were to be set up as in the long run as independent colonies but with the attacks by the Batarians that began when the Batarian didn't get their way; -the human colonies hoped for at the very least that the alliance would back them up (something that did not get done) and as such the human colonies were basically left on their own and to fend for themselves against the batarians. Something that the colonies could do but usually the colonies would hire mercenaries to help keep the Batarians at bay. When the batarains could not get the humans out of what they considered to be their territory; -it was then that the Batarians went crying to the council.

If the human colonies HAD went rogue then they would have not been accessible by commander Shepard in any of the games with the colonies attacking Shepard:
"He is from the Alliance and is a Spectre for the Council."
*Colonists look at Shepard*
"Get HIM!"
*Dog-pile*
BUT as we know that sort of event NEVER occurred.


Maybe some were angry that the alliance had not at least helped them more. However when Shepard is encountered it becomes apparent that they are not "I wanna kill you for not helping us. The humans who colonized here have grown into independent stand on your own people who thing for themselves. Not to mention that the main reason the council and the alliance do not help is political and for the greater death toll from the war that would that was would erupt between the Batarians and their allies and the colonies of the Humans, Turians,  Asari, and Salarians. It should also be noted that Horizon, Freedoms' Progress, and Noveria(i think) are all in the Terminus systems.  

Yeah except those tigers had according to records real power about 3 centuries earlier in the games timeline... so as the titanic was sinking they were expanding and conquering. As to why they lost their ability to do continue is something I will need to look into.

Except with ME1 we know the Nexus is ridiculous so we know that building ships close to the size of the Citadel are not only not easily funded and quite easy but nobody knows how to build anything that big.



At around 40ish seconds. 
Kaiden: Jump Zero was big. But this is a whole 'nother scale. Look at the ward arms. How do they keep all that mass from flying apart?

They didn't. The Citadel was part of the enigma that was then considered Prothean technology they couldn't reproduce - the Citadel and the Mass Relays.