> but all the points you brought forward also apply to the manufacturer firmware but those are even less user friendly and cannot be modified.

That's more than a reach of a claim. All manufacturer firmware are buggy with poor security? That's very obviously false. With closed manufacturers the history is that it's a mixed bag, not a blanket. Some are excellent, some are very poor.

Openwrt has been mediocre and all the negatives about it do not equally apply to all closed manufacturer firmware.