Sometimes the cinema experience isn't as enjoyable or comfortable as you'd hope, and many don't think to complain or ask for a refund if things go wrong. Most cinemas will refund your ticket if there was a technical glitch that was the cinema's fault, for example the projector breaks or the sound is out of sync.
But we've also heard from MoneySavers on Facebook (see some of the comments below) who have complained about annoyances such other cinema-goers being loud and distracting, or the cinema being too cold, and have received refunds or free tickets for a future visit. So if you've had a bad cinema experience, it's worth raising this with staff. Walked out half way through because of rowdy kids and got our money back.
– Lianne S Had compensation from cinema after the film ended for being so COLD 
– Jo-ann We asked for a refund at the end of the film as we were watching a quiet film and next door was a film with screaming and loud explosion effects drowning out our sound. The manager issued full refunds on both tickets.
– Paul C I went to see Star Wars at Odeon but they started to show Coco instead! They stopped it after 10 minutes (I was actually enjoying it!), refunded us and gave us upgrades to the posh screen for next time.
– Claire M As for whether you can walk out of a movie because you're not enjoying it and receive a refund, the big cinema chains we asked went quiet on us – probably because they don't want mass walkouts if there's ever an Emoji Movie 2 .
In general, you're unlikely to be given compensation just because you think a movie's rubbish, yet we did hear from a few users who received complimentary tickets for a future visit, so it may be worth asking, though this very much seems down to the cinema manager's discretion.