Good or bad bounce rate really depends on your strategy, leads you are contacting, and your risk tolerance. To some bounce rate above 1% is too much, while some do not care as long as it is below 5% or whatever number they are fine with.
You can run some campaigns, check the bounce rates, check the bounce messages, improve based on the bounce messages, check if that reduces the bounce rate in future campaigns, and so on until you find a threshold % of your usual bounce rate and you use that as a reference of what is a bad/good bounce rate.
Note for SEG using leads (Barracuda, Mimecast, Proofpoint providers) it is normal to have a higher bounce rate.
Tracking the bounce rate and the bounce messages/codes is a good way of checking if a domain is burnt. Though usually if a domain is burnt all emails from the domain would underperform sharply.
