I think that's what is giving people a strange feeling about this. You prioritized your own desires (not needs mind you) rather than your users. And if your thinking is so off that you really think these are needs during the beta then that is even more worrying.
If I were in your shoes I'd crunch immediately to make telemetry, crash reporting, and logging in three separate opt-in features then get a build out ASAP. Prompt people to enable or disable each with clear language in a single screen (no EULAs or lawyer weasel words) and no dark patterns (like double-negative checkboxes or flipping cancel and accept button colors).
For crash reports and logins there is an even better way to handle this that is respectful of your users without being obtrusive and shows you are working hard to earn trust. Then you only need one post-install prompt to ask permission to share data which is much simpler.
1. Ask the user each time you find a crash report and let them inspect it if they want to do so, then ONLY send the content the user inspected (no hidden payloads, extra HTTP headers, etc). Include a checkbox/dropdown "Always send" or "Never send". The default is to ask the user to help you out. It gives transparency by letting them inspect the entire payload. And if/when you've earned their trust they will click Always on their own. It also covers you just in case the payload accidentally picks up something sensitive.
2. When the user invokes a feature that actually needs a login then prompt them at that time. Or if the context doesn't allow that, show an unobtrusive icon, link, or banner in a context-appropriate way that lets them create an account or login.
3. For sharing let users share things anonymously with links, no account required. Once they've started using the feature let them know they can create an account to "claim" the things they've shared. This can be a good way to show people the benefits rather than just claiming benefits exist. It makes a nice on-ramp without pestering or annoying people who never create an account. And the people they share things with may end up becoming your users.
