While that certainly could be a reason, the blame lies with Harris for choosing Walz. Shapiro probably would have been a better pick, especially as his home state was PA (which was eventually won by Trump). Harris wanted someone like Walz to be in the background and not outshine her, which Shapiro might have done.
Really dude. You guys were saying the same thing 4 years ago. How can they call it if they haven't finished counting the votes. I said that for a reason. Did Trump ever concede? No, he didn't. I guess that you have amnesia