You should use specific manual test sizes for your tests. For Gen 4, use the 12 MB for downloads and the 3 MB for uploads. For Gen 5, use the 25 MB for downloads and the 4 MB for uploads. See this document for more info: https://community.hughesnet.com/t5/Tech-Support/Think-you-have-slow-speeds/m-p/110034#M74607
I think the crazy graph means there's congestion, but I'm not an expert on this. Others will have more to say about all this.
If you would like help, please follow the instructions in the link maratsade has provided to you, just as he did when you started a new topic with the same title two weeks ago, and which was closed due to the lack of follow up.
We're closing this thread since we never got a reply from you again. If you still have concerns, please start a new thread and include a detailed explanation so we can more effectively help you. I recommend posting updates as soon as possible so your thread does not get closed again for lack of follow-up.