Error handling was terrible in VB, evidenced by the number of production VB apps that panic when clicking the wrong button or typing the wrong letters. Going from knowing enough to prototype to professional quality development was very hard.

You could always tell a VB app. Controls don't line up, windows either prevent resizing or do so badly, lots of redraw flicker, varying visual styles, and crashes on seemingly benign user input.

Database operations are often performed with no expectation of failure, the network is assumed to never have a problem, security policy is inconsistent, etc.

Perhaps some blame can be laid at the learning materials that emphasize the happy path and treat errors as a separate subject.

I hated VB and am so glad it is almost gone.