> Aliens have super sophisticated tech that is hardy enough to travel millions of light years through space but it crashes so easy on earth?

Selection bias. We don't know how many crafts fail to make it to Earth. Maybe the trip is extremely dangerous and only a percentage actually make it.

And/or, like most air & space travel, takeoff and landing are the most dangerous parts.

Also, we have a very good handle on air travel, but planes still crash sometimes.

(I don't actually believe we have ET crafts coming to earth, but it's fun thinking it through).