7 months into fwb

Meet set 2 days prior, our usual.
Girl is chronically late to everything in her life and always ask for 30min delays.
This does not bother me much as long as she shows since it's mostly just sex on tap.

This is the first time she flakes, 30 mins before meet up at 7pm. Massive disrespect.

Text:

H: Can you show at 7:30 tonight (she does this everytime)
M: Yeah np
H: Ugh, I have to do groceries too, are you free sat instead
M: I am not
H: You busy Thur, Fri ? We might have to meet next week because "technical terms" works issue
H: "more technical terms"
(30min)
H: So sorry
(1h)
H: You okay?
(1h)
M: Tardiness is rude but acceptable, flat-out wasting my time is the biggest turn off you can muster up for me. The medium is the message... I hear you loud and clear here. You can atleast do better than groceries... That's just cold haha
(2h)
H: I hear ya, forget the groceries. The reason I canceled was because I finished work at 8pm
(2h)
M: If that's the case, I would have meet you at 8h30. Be late, reschedule 24h before, etc. If you're unsure of your schedule we'll meet another time. All no problem for me. Don't ever flake on me 30min before a date again. That is a surefire way to get nexted out of my life. I am not threatening you, I'm telling you where the line is. If you respect my boundaries we all good. Fyi, I switched plans around and am free Sat if you're down. Ball's in your court babe!

Now there are thing I did right and things I did wrong here.

Good:
Let her linger a little after flake (you ok?)
Set frame of you mess up again and you're done, everybody gets one style

Bad:
Clearly my messages are too long and overtly show redpill terms
I should have ghosted for x amount of days, not hours
I put too much meat, where the empty space would have created more dread
(Major) Saying I'm available Sat after all (My though was she would think I pulled Sat girl off the bench to cover flake tonight. Also, major curfew lockdown announced today so everybody's plans got rekt for Sat)

Thoughts?