I've not had much problem. Never had that problem with Reddit. I use the free veepn browser extension.
Accessing imgur from the UK has been a bit tricky. Sometimes they limit certain IP addresses like the US one usually doesn't work but the Singapore one does (slowly) for some reason.
You can access Reddit from a VPN while signed into Reddit.
1) In my home state I can no longer access Pornhub
2) Last month I visited Mississippi and could not access BlueSky, even though I can from my home state.
[I personally blame this on the "holier then thou", "don't tread of me" conservatives who cannot resist the urge to try to rule over the activities of others.]
I haven't selected a VPN provider because I have heard that a lot of websites create barriers to people who use VPNs. For example, I've seen people say that couldn't access Reddit via a VPN.