I'm not defending the other poster, merely proposing reasons for why people view Biden differently.
Biden immediately cut funding to the wall and the executive order gave him time to reappropriate funding for better purposes. That may include finishing construction of certain sections when contracts have already been signed, but that's because they have an obligation to contractors to honor the contract. All other funding has been moved elsewhere.
https://www.whitehouse.gov/briefing-...-construction/
Biden isn't building new wall at all, but he is using funds that were already committed to update sections already built or to improve the structures existing, according to Snopes. In some cases it seems that canceling the contract would cost more than finishing it, so they are viewing it as a sunk cost at this point.
https://www.snopes.com/fact-check/biden-border-wall/
I mean, if that's the hill of criticism you want to die on, go for it, but most reasonable people who don't have an axe to grind are understanding that some decisions need to be practical.