In the context of the sentence "Her brilliant performance won her critics and fans alike," the most suitable word from the options you've provided is 2 accolades.
Accolades refer to awards or expressions of praise, which aligns with the idea of winning both critics (who might offer accolades in the form of positive reviews) and fans (who may express their admiration and support).
The other options do not fit as cleanly:
- Coteries refer to groups of people with shared interests or activities, which does not directly relate to the performance.
- Diatribes are forceful and bitter verbal attacks, which would not be a positive outcome as suggested in the sentence.
- Shibboleths are customs or beliefs distinguishing one group from others, which also doesn't relate to the praise for a performance.
Therefore, 2 accolades is the correct choice.