That's because they're not wrong. Did you do the two minute fact check? Here's a link
United States Coronavirus: 17,628,578 Cases and 317,929 Deaths - Worldometer (worldometers.info). Start with the northern plain states (Dakotas, MN, WI), and see when the positive tests started dropping. Then start working your way south, east and west, kind of in the pattern of... dare I say the jet stream?
I wouldn't post information on COVID-19 here I wasn't at least mostly if not fully confident it was correct, regardless if it fits my "agenda". My agenda, by the way is only to show the truth about COVID. If people were better informed of facts, better policy (yes, this is why COVID is actually political) would be made.
On another note, I'm struggling here. What on earth is so controversial about demonstrating findings about the seasonality of COVID-19? Please, someone tell me.