I read it clearly. You wanted to "educate" when to some you came off as a jerk trying to bargain.
While his rate is over my personal budget, seeing him quote $600 just off his appearance and not knowing what exactly was requested isn't a shock in this industry, in 2026. As I said both sides were wrong in the communication, moreso the provider. He shouldn't have replied at all and just blocked you.
Societal behaviour has changed drastically post-pandemic in this digital, social media era we're currently amassed in. That's also reflected in this business as the newer, younger providers are joining. Most of them don't have the decorum, elite professionalism and respect that veteran clients would normally expect.
When I started getting into this hobby I was taught in this forum by fellow members that your kind of response in the screenshot is frowned upon and it most cases will trigger at minimum getting blocked.
So as you wanted to give some education to that provider, here's the education when it comes to dealing with some high-priced very young providers.