I'm massively supportive of small businesses, I try to use them as often as I can. We are lucky to have a high street with lots of independent shops. However, my trips to town are limited due to being short of spare time, plus parking costs a fortune unless you limit it to the free 90 mins that you get in the supermarket car park, etc.
But time and time again I go to one of the independent shops to find them randomly shut. I get that they probably only have one staff member so it's hard to stay open if anything out of the ordinary happens, but it's still so flipping frustrating.
The last few trips to town have ended with me ordering stuff online or going into one of the chains because the independent shops I wanted were closed for no apparent reason. The independent health food shop is the worst, they close for an hour at some point between 11 and 3 for lunch but it's not the same time day to day and they don't say on the closed sign what time they'll be back, so if you get there and it's shut you don't know if it's worth trekking back to that end of town in 30 mins or not. I tend not to even bother checking now and just go straight Holland & Barrat instead. Several more shops seem to rely on posting that days opening hours on their FB page, but thats hardly a reliable way to tell people if they're open or not! Last week I had an afternoon off and took a trip to a different town specifically to go to a shop that stocks work by local artists to get some cards and gifts, only to find it closed with no indication of why or if it was opening late or what. I checked their FB page while stood outside but nope nothing. Later that day (3 hours after their stated opening time) they posted that they'd decided to open later for the Christmas lights switch on and that they hoped people would come and support them 
Anyway I've just seen yet another slightly passive aggressive plea from one of the owners of the worst shops for this, complaining how quiet business is and telling people to use them or lose them yada. Well yes I totally agree but more often then not when I try to use them they're not bloody open!