We don’t either. The plagues -- or at least that last one as a final straw -- were the reason that Pharaoh eventually let the Jews leave their Egyptian enslavement, so that’s ultimately good for the Israelites. 

However, we’re not happy about the toll these plagues took on the Egyptian people, which is why we spill out some of our wine when we recite the plagues, to show that we recite them with no revelry and are diminishing our celebration out of compassion for Egyptian suffering. 

Also, all this talk of plagues is making us nervous during our second Pandemic Pesach, so let’s move on.