Hi, currently just finished my first year in exe!! I come from Birmingham so I can kinda compare the two. tbh nightlife is a lot better than I expected it to be! it's not a major night out like Birmingham, Notts or Leeds but it's actually quite good. You kinda get like a different vibe in a good way though because you will always bump into someone you know there and it's got that student feel to it. The main clubs students tend to go to are Unit 1, Timepiece, Fever and Move. I've only been to three of the four but loved all of them as a Brummie. You also have a few more places you can go which aren't clubs in Exe. There's several cocktail bars in town such as pink moon, turtle bay and coolings to name a few. We also have three spoons in the centre of exe (one of which is the biggest in the UK).
As for shopping, it's not that bad in my personal opinion. Most things I have wanted I have been able to get them in town which is such a short walk from campus. You have several grocery shops there (Sainsburys local and Tesco), fast food restaurants, drugstores and the basic clothes stores (H&M, primark etc.). There's also a cute alleyway in town with all vintage and crystal shops if you're into that haha. Only downside I would say about shopping in Exe is that the prices can be slightly pricey at times in terms of food shopping.
Overall, I'm loving my time at Exe and would say it's far from boring and wouldn't change it to a bigger city uni as I love the vibe. Any questions lmk though