It was, but it didn't become bad until June or July of 2020. For 6-8 months prior to that point, I honestly thought Trump was gonna win.
Why do you think it was June or July as opposed to April or may?
If you'll remember the country initially started to rally behind Trump in the early days of the pandemic, and it was around June/July that it became clear that he screwed the pooch in dealing with the pandemic (and that he was warned about it as early as January), and it was also at that time that he dumped a can a gas on the fire that was race relations in the US in the aftermath of the murder of George Floyd.
In short, Trump could've won, but he shot himself (and in turn the country) in the foot one too many times and lost it in the end.