Forgetting close family members names is a serious issue. Pretending only one of the candidates has an issue with names, places and events is dishonest and is further proof of those in the EC.
I don't have any concerns about Trump's cognitive abilities. That is only an issue with Biden, as far as I can tell. And to deny that Biden has an issue would be ridiculous. Just watch any clip of Biden from his time as a senator and you have to be blind to not see the starkest (and sobering) difference.
But of course there are major issues with Trump also, namely his temperament and honesty IMO. I would prefer many others over Trump (including, but not limited to, Mike Pence, Tim Scott, Ted Cruz, Marco Rubio, Mike Huckabee). But in a head-to-head Biden against Trump, I would opt for Trump, as I think the risk level is significantly lower (he was president for 4 years and nothing crazy happened, yes, even January 6 doesn't scare me), and more of Trump's policies align with mine.