It sounds like the V22 has aerodynamics problems, but I think the V22 has even bigger mechanical problems. (I am a mechanical engineer, but I don't claim to be an aero expert. I know a thing or two about mechanical systems, however.)
Simply put, the V22 is a flying Rube Golberg Contraption. I wouldn't trust a surface vehicle with that many moving parts.
Let's see: moving engines, structural pivot points for the entire engine / transmission assembly, power shaft passing through the pivot points and across the entire width of the aircraft through flexing wings, full collective pitch mechanism for two rotors, hydraulics to move the pivots, wing flaps...
It has no backup recovery methods. (glide, autorotate, eject) When one of the parts fails, you just drop like a rock.
Also note critical parts in close proximity to help the domino effect. For example, see the first fatal V22 crash where an engine fire took out the transmission shaft.
Some have said the aircraft is "not mature." That concept has been in development for over three decades! Okay, quiz time: what does it tell you when a huge budget and three decades of R&D doesn't produce a reliable product?
Answer: Brute-force engineering won't make a good idea out of a bad one.
I won't fly on a tiltrotor. Neither should you.
Dalebert, Mechanical Engineer