If I understood you correctly, this specific blink camera, as well as your Ring camera, have similar issues? If so, it might actually be your wifi, but not bandwidth or signal strength. It may be channel congestion. Try logging into your router, and change the channel of your 2.4ghz signal. All router’s default to channel 1, meaning everyone in wifi range of you is using that channel (if they haven’t changed it themselves).
I personally found channel 7 had the lowest utilization, so switching to that increased my speed/stability tremendously.
Secondly, what is your projected internet speed? This may not be your issue, but it’s a good thing to check It’s safe to allocate around 5 Mbps per blink camera, on top of your other devices. So in theory, if you ONLY connected blink cameras, a 5 camera system would require an internet speed of 30mbps to operate efficiently.
I hope this helps, if it doesn’t, I would stay on blink. They’ve replaced some of my equipment with no issues, and my system works great now.