A movie/show/book/game can be objectively bad, but I think whether a person subjectively likes the thing or not is much more important and interesting to talk about
Interests
Disney, Nintendo, MLP:FiM, TV Tropes, Fan Fiction,
To answer your question regarding Fang the Sniper:
1. Badass design
2. Feels refreshing to have a proper mercenary-type character in Sonic
3. Not evil; just greedy
4. Has great team potential with Bean and Bark