Well, that seems like conjecture and he could just be a disgruntled employee, its not unheard of to give interviews aimed to besmerch your former boss. Lucas got more support than he didn't and the only reason the big studio companies thought he was a joke (back then) was because they resented the fact that anyone would want to work outside of their jurisdiction.
We must remember George's humble beginnings as an independant film student and how he had the door shut in his face several times. The big studio companies saw it as spite that he persisted in doing Star Wars, when really, he's just a man that refused to compromise his vision and creation.
As far as Jar Jar Binks, the character was successful- it entertained children. It wasn't meant for adults or as "comic relief" as some thought the character was to be. Any comidic value the character posesses seems cheesy and subpar because adult fans forget that he's a character for the children specifically, and children eat him up.
As for George firing people, he had every right if they were not going to do this his way. No one knows Star Wars like George Lucas, and only he has a right to say what it ought to be. If you aren't there to make his vision a reality then you aren't needed. This isn't to say George has not allowed his staff and people to be individually expressive or put forth their own ideas. Quite actually, there are many people still to this day that make Star Wars what it is from the conceptual artists to the animators, and to the actors themselves and their performances.
In reality, George no longer has complete control over Star Wars, and he was willing to accept that if the series could be embraced more by those that would continue it and if they stood the test of time with him and didn't compromise how he wants it.
We have a way of pinning every failure or shortcoming on Lucas himself because it's his creation, and that is also not fair based on what I just said. Especially when you take into consideration that he allowed for the "expanded universe" and individual author stories depicting events that didn't necessarily happen in the canon of the series itself.
Getting back to the topic here (our topic anyway), George has acknowledged and given us a blueprint on how the series (presumable tv series) should run at first to tie up loose ends in the aftermath of ROTJ, if in fact its based anywhere in this timeline chronologically.
For instance, anyone who goes further than ROTJ knows Palpatine is not gone or dead and resurfaces 6 years after the battle of Endor.
Basically, the story has now panned out at this point, with the situations reversed. The New Republic is in the position of power and now the Empire is like the Rebel Alliance was, broken up and scattered but by no means defeated.
Theres also the individual character plots to consider, such as Luke's rise to the position of Jedi Master and Leia's Force training, her and Han's children, etc.
Although this may never happen, as Lucas has said before that the Skywalker story arc will be over once ROTS has been released. Its still possible he'll change his mind however. Theres alot to be done yet.
EDIT: We should stop, this isn't a SW thread and it is off topic in the sense thats its not about Hellraiser. So unless theres more talk about this including the original poster, I think we should stop out of consideration. I'm glad we had this chat though. 🙂