[sysop073]

What? No. An ad hominem is "I think your argument is wrong because your face is stupid". "This is bad software because it looks like it's made by amateurs" isn't attacking their character, it's attacking their ability to write good software, which is highly relevant.

[n8henrie]

"The code is bad because it was written by a novice dev" sounds like an ad hominem attack to me (as opposed to "the code is bad because of X attribute of the code itself").