Bad 4 years under Biden?

Can someone explain it to me like I’m in fourth grade? What exactly do the conservatives think was so horrible over the past four years that personally affected them? I’ve heard things like the border, but that didn’t really have a huge effect on our day-to-day life. Every time I ask, I get something like “if you don’t know then you’re an idiot“. Please help me understand why they hated his presidency.