As when someone at work makes the job more difficult than it needs to be just because of the way they are and their attitude towards the work, and not just for them but for others too. Hello - thank you all for your efforts. It occurs to me that it might be better to put this question to the workplace section as I'm looking for a situation-specific term that an employment expert might use.
You might try overcomplicate as in
“Todd tends to overcomplicate everything he does.”
Oxford Dictionaries defines it as:
Make (something) more complicated than necessary. ‘the basic idea is quite simple but some people tend to overcomplicate it’
Exacerbate. Aggravate. Complicate. Convolute. Perplex.
Not quite the same meaning as "making more difficult", but with the same effect.