Looks like (1) in the original points is well covered by tiwane, plus here are some summary links for the other bullets:
(2) try this filtered version of Life identify: it’s sorted by most recently “active”. Just skip through the blurry or weird things, and look for the records that have a major disagreement, often at Kingdom level, and add your vote either way if you like
(3) many id issues are collected at https://forum.inaturalist.org/t/computer-vision-clean-up-wiki/7281 including some wrong locality “regulars”
(4) default view of https://www.inaturalist.org/observations/identify