It’s one thing when people just don’t much like HR’s personality, or prefer Harry, and so on. It’s another when they’re arguing things that are pants-on-fire false (”HR stole ideas from Iris and Joe!”) or just not borne out by the facts (”HR is useless!” “HR doesn’t bring anything unique to the team!” “HR has no qualifications for training Wally!”).
Not only is his bubbly personality SORELY needed by both the team and the show, HR consistently comes up with good ideas, gives emotional support, has excellent research skills and a background in meta-hominid-fighting, and put together a whole damn STAR Labs Museum concept - which may well save all their asses sometime soon.
Also he makes great coffee and looks pretty. That’s an entire job right there.