Interesting observations but I don’t think they’ve overextended themselves. (At least not yet).
I have only a limited basis for this assessment but I’ll share. I also don’t know what the “90 degree” issue is so I can’t speak to that.
My experience with Arlo tech support and Wyze tech support was night and day. Arlo for Android had a bug that caused an Android service to start and never close. I complained, complained and complained and finally after I literally debugged the issue and pointed to the exact service a month later they quietly fixed it – even though the issue had been in forums for 2 years before my complaint came along. That is poor customer service, poor testing, poor development cycle. It showed me they just didn’t care.
Wyze has some issues, especially when it comes to connecting up to the network that some good software testing would detect and fix but they’ve missed it – nevertheless, I could actually chat with their tech support and get an offer to send me a new cam. Is that perfect? Definitely not. However, it speaks to an attitude that I find value in.
Development, especially as you become a much larger company with many more products to support in the Wyze app, is going to be challenging but looking at the Wyze App changelog there seems to be incremental improvements to camera interactions. That is a good sign.
Your warning is prescient. This is a critical time for Wyze, will they be able to maintain the quality experience of (arguably) their flagship product while expanding their product line? That is hard and while I disagree with your current conclusion I find your concern worthy. Hopefully the executive-level Wyze-team keep their eye on the quality-ball, across the product offering. None of us wants to see Wyze bankrupt.
The reason they do not fix bugs that their customers report is because they cannot. They have to wait for Xiaomi to do it for them. Now you see why they avoid the forums. See why it takes them forever to fix something if they ever do? See why they do not try to give really good customer support? They cannot! It is clear that they have little to no control over fixing “Wyze” cameras/products. Wyze is no more a technology company than my dog is. Do a Google search for Xiaomi Xiaofang. You will notice something weird. All the cameras and products look very familiar. Here is one video for you to look at. Looks familiar? 
I am most likely going to be banned and this message deleted. So pass this information along…
I’m much more interested in how they tie it all together in software, automation integrations, etc.