There is definitely a huge bias in the rolling that makes even easy checks, say DC 5, only succeed half of the time or less.
There's also the issue that many things are gated behind several checks in a row. I recall a conversation with Shadowheart requiring 3 persuasion checks of increasing DC. Even with friends + guidance + a CHR max character + proficiency some of these checks were 10+ and as we all know that's essentially an impossible roll in their system.
