Yes, I'm definitely including megachurches (esp. nondenominational megachurches) as evangelicals, and I totally agree with the friendly small church vs dystopian megachurch experiences. Just about any TV pastor is an evangelical as well. For someone who's not a believer, I'm surprised at how sad this state of affairs can make me. Joel Osteen/Jim Bakker/Jerry Falwell Jr./Pat Robertson/etc. are just the worst.
If I could point at any one evangelical belief that for whatever reason offends this atheist, it's Prosperity Gospel. The idea that you should follow Christ so that material wealth will be drawn towards you, in correlation to how hardcore you are about Jesus. Of course this conveniently explains why the Joel Osteens of the world have mansions and private jets and so on- it's not a pyramid scheme, it's Christ's blessing magically seeping into their bank accounts on account of their innate holiness. But what's more depressing by far is that they've gotten so many people to actually believe that that's what's in the Bible.