With the growing amount of complaining and lack of bug reporting from users on this forum, not everyone should be installing these betas. Especially if you don't know how to install it. There's too many things that can go wrong, and then there's the people that are stupid enough to sue Apple and ruin it for everyone. And I don't care about feelings. The truth is the truth.
You dear sir, are living in a dream world where your perspective of the truth seems to be 'but I am right, because I hate stupid people and I just don't want it'. Nothing I can do here. I can't have a normal conversation with someone that thinks Apple has chosen you because of your IQ and deep motivation to properly beta test.
To be honest, I don't think that's it at all in your case. You said the fun is then ruined. Beta testing isn't meant to be 'fun'. It's meant as a privilege so you can help review and provide feedback on unreleased software. If you only take a beta as a 'fun thing to do', because it is the newest of the newest, perhaps that just means you don't actually dive in and do your diligence.
If the feedback Apple is getting that installation is confusing on whatever end, that is valuable information, and could lead to improved and smoother procedures.
I appreciate your input, value your argument / explanation, and I am sorry we're disagreeing with each other on the point if people that aren't on a high-horse are allowed to beta test software.