I think the issue comes when people try to circumvent the give-way priority - which gets worse when there are multiple lanes and multiple exits.
It certainly seems to be a people problem rather than a roundabout deign issue from my experience?
People trying to "beat" people out onto the roundabout rather than giving way, people not using proper lane discipline and squeezing/cutting into other lanes etc..
Roundabouts make my bicycle commute way faster. This in The Netherlands where we cycle a lot. Difficulty or death is entirely incorrect. Suggest to compare the designs across countries, maybe there's a huge difference in the design?