After 60+ hours of played time across many classes, I've found that to never be the case and the hit rates are accurate.
Agreed. Whilst I wouldn't completely rule out an issue with the RNG (this being Early Access and all) --
there is absolutely nothing obvious going on with that in the way people make it sound.
The majority of these threads can be explained with confirmation bias plus what Tim Cain of Fallout fame says here (sorry for always linking that, this is a must watch for anybody, maybe even Larian's playtesters).
There does seem to be something screwy with the RNG unless the chance-to-hit isn't the full story. I've noticed the 75+% chance translates into "will probably miss" and it frequently does it several times in a row.
"Will perhaps miss" is what a 75% chance literally is. It's akin to rolling at least a 7 on the D20. Long-term average, a fourth of all rolls should be a miss. Missing twice in a row is as low as a 1 in 16 chance, doing so thrice a 1 in 64 chance, all of which very likely to happen if you factor in how often you roll and how many hours you may play. Everybody should experience this quite frequently. Even missing that 75% chance four times in a row is not any higher than a 1 in 256 chance, hugely far from winning the lottery.