Google L5 Scope and exit options

Want to get a sense of how much scope Google L5 has. Currently a L3 at RH. Accordingly to levels.fyi, RH L3 goes beyond Google L5, but I've seen Google L5 get staff elsewhere, but haven't seen RH L3 get FAANG staff. I get advancement beyond google L5 is challenging, but can the experience help one's overall career advancement, and help get to higher levels elsewhere?

G offer Base/bonus/equity/signon
210/31/525/50 sign

I was disappointed with the numbers since I'm seeing 500-600k offers for seniors, but I've also seen a lot of downleveling from G so maybe I should be happy about the level. I had a competing offer in the 500's, but G refused to budge.

Current TC ~380, dropped from 470

With front loading, 1year TC is 460, but massive drops in year 3 and 4. The TC difference isn't large, but the I'm losing faith in RH business model and the mission.

Yoe: ~6

I expect a lot of Non-googlers bashing, but would really appreciate perspective from Google folks.