It’s always better to start a new thread/ topic Martin, as your problem is likely different from the OT.
But while we’re here;
First and foremost try to identify what is breaking your site by just disabling CSS or JS or Image optimization (incl. lazyload). Once you know that, dive in and try identify what code/ files (CSS or JS) are responsible for the broken feature and try excluding that. If the problem is with JS, chances are you’ll find useful information on your browser’s developer console. There’s more info in the troubleshooting tips and info on exclusions in the AO FAQ.
Feel free to follow up with your findings, but do create a new topic if so ??
hope this helps,
frank