This one seems like it’s very accent-dependent. A cockney geezer will definitely say “be’aah”, but a geordie would say "be’eh and someone from the west country would say “betterrrr”. I think the American pronunciation makes the R sound a lot longer (you can tell I don’t know all the property linguistics words!) so anything shorter probably sounds weird to you.
I’m sure it’s definitely regional, just like accents in the US. But generally in England at least it’s non-rhotic. I know Scotland is different, maybe Wales too
Most English people have a non-rhotic accent, meaning not pronouncing the r after vowels so words like “better” become “betta”.
This one seems like it’s very accent-dependent. A cockney geezer will definitely say “be’aah”, but a geordie would say "be’eh and someone from the west country would say “betterrrr”. I think the American pronunciation makes the R sound a lot longer (you can tell I don’t know all the property linguistics words!) so anything shorter probably sounds weird to you.
I’m sure it’s definitely regional, just like accents in the US. But generally in England at least it’s non-rhotic. I know Scotland is different, maybe Wales too