Welll, the initial Me 210 pilots found no troubles with the plane. When Luftwaffe started pushing pilots with little flying experience, the crashes started.
The cure had been suggested before production started, but it had been rejected because it would have slowed down production. As things happened, it all got unbelievable messed up when the production was first cancelled and then orders came from different directions. The cure to the 210's handling was quite simple actually - a bit lenghtened fuselage and some other minor changes, but restarting the production line was a hell because some of the factories had already been ordered to retool for another type, some of the jigs had been destroyed, some fuselages destroyed and so on. It was all a unbelievable mess. The rest of the 210s were modified and used. Hungary built more of the modified Me 210s and used them successfully in the eastern front, pilots well liking the plane. Me 410 was a larger redesign - but came into front lines later, and was not successful anymore as bomber destroyer because the escort fighters, but very good as recon and fast bomber.
Saying "never heard of good things about 210" only shows that you haven't read enough.