I agree, a lot is not under Biden's control. However, he is not completely blame free. The administration waited far to long to counteract inflation, continuing to say it was a "temporary" problem and would go away, as it was steadily rising. As for the border, yes, congressional action is needed, but just a few weeks after he said he could do nothing without congress, he penned an executive order to infact close the border after a certain number of crossings per day. So which is it?
In any case, the Reps are very effectively spreading FUD about these issues, and in perhaps his most critical weakness, which I did not mention, he is frail, a horrible speaker at his best, and even worse now, and has no charisma. These make him very ineffective at countering the Rep bull****. If the Dems had a popular, moderate candidate, I would say they should replace Joe in a heartbeat. As it is though, I really dont know what they should do. Biden is undoubtedly a weak candidate, but any possible replacements except Michelle Obama have polled worse than Biden.