I'm going to echo that you need to stick with one tense, but I'm going to differ in saying that you should stick to past tense. Past tense is the correct tense for fiction, and although we have some writers on the site who use present tense, they knowingly do so as a stylistic choice, whether or not that choice is correct or not.
Now if the first scene was just coming from Madrox's perspective, an argument can be made for present tense. However, you should be very careful when switching viewpoints. Writing from the direct viewpoint of a character can offer some fun opportunities to get inside a character's head, but it can also unintentionally limit you. For example, details outside the character's point of view. If you do decide to use first-person view this way, try to make a definite scene transition. Maybe you can use
italics to denote a person's thoughts when you make the switch.
Others have pointed out the lack of description. Don't worry about it too much, it will come with practice. While your first scene could use a bit more establishment, you manage to set the scene just fine with minimal details. I know it can be difficult to get a beta reader, but you might want one not necessarily to find errors, of which there aren't that many, but to suggest ways to improve your prose.
First scene drops us right in the action. A good start. I didn't know Madrox could give his clones powers like telepathy. That's an interesting twist. The only time I got lost is towards the end with the cosmic dupe and the crack in the sidewalk. Not really sure what's going on there. One place where some description and slowing down will help.
And when we switch to the next scene on a different planet, suddenly you're great with descriptions. Keep doing stuff like what you're doing at the beginning of the second scene and this can only improve.
I'm pretty sure that's not what Dragoon means, but, whatever, alien planet and all.
The Dragon-Men scene just gets weirder and weirder, with biological STDs, someone who somehow has sex with a quarter of the population, you really need him to personally sleep with a quarter of the population to spread an STD?
When we get to SCUM Labs and Tombstone, Texas, it looks like you've had some formatting issues. Sometimes different word processor programs don't translate well to Proboards, so I recommend previewing your post in Proboards for a final edit.
I understand why you use the racial slur. My personal view is that it's possible to convey the same themes of racism and old prejudices without resorting to those kinds of words. It's something that takes practice.
So, a few questions on Frankenstein: Is this supposed to be the Dr. Frankenstein of legend? Is he immortal or a descendant? Or is the whole Frankenstein story being changed to the modern era? Does the Mary Shelley novel exist?
Overall, this was a good chapter. A bit eclectic at times and could use a bit of focus, but definitely not bad for a first chapter. You know how to draw a reader in, and most of the things that me and the other reviewers comment on just comes with practice. I look forward to reading more.