I've read some of the critique, but aside from the art bloops, everything else is really just subjective taste from the reader. I thought the strap usage was pretty in line with the title and the theme of the work of them going at it like dogs. My own take is that this was at its core a yuri work, just with BDSM and toy usage. The way that Maki and Honoka care for each other constantly throughout this work through reassurance, checking in with each other, and aftercare, is extremely full of love.
I frankly found this work a lot softer (emotionally) than other yuri works where it's a lot more about the sexual nature of the work than the emotional connection between the characters. Although there were obligatory POV shots for self-insert, I didn't really feel that it took away from the yuri aspect of it.
Though, if you dislike this work, that's also totally OK. Everyone has different tastes.