The miss rate hasn't actually gotten that bad overall - kickers are still converting something like 94% of extra points, which is pretty solid. That said, you're definitely noticing a real trend. There was a noticeable dip around 2015 when the NFL moved the extra point back from the 2-yard line to the 15-yard line, and while guys have mostly adjusted, the percentage has stayed lower than it was in the old days when they were basically automatic from super close.
A bunch of things play into it. Some kickers struggle with consistency on the longer kick, and weather matters way more at that distance. You also get the occasional setup or hold issue - sometimes it's just a bad snap or the holder putting it down in a weird spot. Plus there's the mental game. When you're kicking from 33 yards instead of like 20, there's just more room for error to creep in. Confidence can mess with your mechanics too, especially if you've had a couple misses recently.
The other thing is that in any given week, you're seeing 32 games with multiple extra point attempts each, so statistically some teams are gonna have rough stretches. If your squad had two miss in one game, that's unlucky but not unheard of. It probably felt worse because they were back-to-back plays, but over the course of a season most kickers still nail like 90-95% of them.