But it's easy to understand Miguel's position. It does feel as if Johnny gave up on Cobra Kai as he envisioned it and rolled over and let Kreese take it from him.
As for Miguel, his love life seems uncertain. It wasn't until Hawk brought Miguel up at Cobra Kai that it registered that Tory hadn't so much as spoken to Miguel since the incident.
Tory's idea of helping Miguel is waging this war between Cobra Kai and Miyagi Do. As she said as much to Miguel, and he was unimpressed, it highlighted how stupid it is.