Should I have my three front teeth re-done since they look bigger and have a different color than the rest of my teeth? (photos)

You should 100% be able to get a better cosmetic result than what you currently have by either replacing the existing bridge or placing an implant where the tooth is missing and having the adjacent teeth crowned. With photos and communication with the dental lab, it is very achievable. :)

Yes this bridge is aesthetically unpleasant , contour , shade, shape of the teeth is not correct.
If you redoing it you have two option
1) Doing a new bridge
or 2) doing an implant and two separate crowns for adjacent teeth .

if you’re unhappy with the result, then yes I’d consider redoing the zirconia bridge. You should be  able  to get a more natural looking result. If redone, ask the dentist to see the final bridge tried in before it’s cemented so you can make sure you are happy with the final result.