It's extremely demanding, which can lead to burnout.
HR:
You sometimes realize people have been fired by trying to send a DM on slack.
It's impossible to negotiate salary/stock, they produce random grids they didn't respect and don't provide the full data, the pay is completely opaque for employees.
Read your contracts before signing anything, HR will not provide any details about the change.
After sending your resignation letter, they will basically ghost you.
I never got a resignation letter or answer to any email (couldn't exercise my stock options because it was my professional email)
That's the first time I got treated as a completely disposable resource.
That's sad to see how reactive you are on glassdoor compared to direct contact.
Terminations: While I understand your POV, and the privacy reason, I can tell that during my employment and my discussions with my peers during that period, most terminations were extremely stress and fear inducing for people and mainly not understood, including the people close to them. I had such conversations with more than 10 people from different teams.
Compensation: You're referring to the grids, we don't have access to the data to produce the grid (I asked for it), so yeah we know where it should comes from, but we can't verify it and the grid seemed close for all countries when available external source give 2-3x ratio for some country we will observe a 20% difference. Grids make any negotiation impossible, especially considering how a raise is decided.
Contracts: Fair enough, we should read our contracts, but naming a contract contract for A while it's A + B and not mentioning it with the email is IMO misleading and is reducing the trust in HR.
Equity & Contact Info: Fair, while you have no legal obligation after the contract ended, I considered answering an email (even negatively), is just basic respect for former employees, maybe i don't realise legal implication of that.
Regarding not providing a separation letter when asked, it's not fair as it's sometimes required by other employers.