Used to work for a sales company, impulse is a textbook tried-and-true sales tactic. For everyone like yourself that decides to sit on it another jumps at the offer.
I used to work at Wag a for a few months, leaving shortly after the new CEO was brought on and they received the SoftBank investment. The fact that things got worse since then is not surprising. Management was already pretty disorganized, they were bad at managing funds (the salary discrepancies were very real), and putting it mildly it was just an unpleasant place to be. There was a staggering amount of turnover, especially with tech roles, in the short time I was there - one minute someone would get called into a meeting and that was the last I saw of them. I cant imagine the technical debt they've been accruing from having a carousel of developers.
I know they wanted to position themselves as the one stop shop for dog everything (not just walks but sitting/boarding, training, food delivery, etc) which is what I think helped them raise the funds, but I think they've taken too long to resolve the issues around their bread and butter of dog walking. The fact that the Viners and Meltzer are all since left as well is pretty telling.