Not sure what you mean by lab engineered. We do not have the technology to build a living (or semi-living) creature. Imagine the implications for the Theory of Evolution if mankind were to make living creatures (even the most basic) from non-living components!
However, if you want to say that the virus was purposefully mutated in a lab, I agree with that. The story that a bat/pangolin living in a cave in Wuhan spread the disease, while "coincidentally" there is a bio-engineering lab in Wuhan, that's a bit hard to accept. Occam's Razor, after all.
The part about the CDC, well, I try to remember that these are human beings, who were under a lot of stress. The learning curve was high, and partway through they did backtrack on some of their earlier recommendations. There was some trial and error going on, but it's hard to blame them for that, desperate times and all. And if now they are doing some CYA, well, who hasn't done a little backside covering from time to time? Where you see a government conspiracy. I see people being people. I also don't understand how you can simultaneously believe that people in government are idiots while at the same time believing they are mastermining massive conspiracies.
As for Ivermectin, here is a clinical trial report from the New England Journal of Medicine showing Ivermectin to be ineffective against COVID 19. Do you think the NEJM is also part of some massive conspiracy to keep people from a cheap cure? What am I saying? OF COURSE YOU DO. As for your contention that Ivermectin was effective when used in other countries, do you have some documentation supporting that? I'd like to see the data.
https://www.nejm.org/doi/full/10.1056/NEJMoa2115869