Tough break. I also spoke w/ a Snap Recruiter around the same time as you, and was offered that ridic amount of equity- they were talking about 600k for L5, or over 1m for L6. I felt like this was a huge red flag that their equity was bullshit. And that vesting schedule is an obvious scam. Reading Glassdoor is nothing but stories like this one. Sorry you went through it. None of this surprises me, Snap Leadership seems like nothing but jerks.
So 250k per year in stocks + up to 200k in salary + 40k annual bonus. 500k total. That's a really solid result for someone with 10yoe in the big tech companies, top performer. Solid, but nothing to shout about.