Hello Wil,
Welcome to Microsoft Community. I am a Microsoft user just like you, I hope you are doing well.
Based on the information you provided, it seems that you are not satisfied with the new Outlook for Windows client and its features. You prefer the old Outlook for Windows client and its functionalities. You also have a specific problem with removing attachments from emails in the new Outlook for Windows client. I understand that this is a very frustrating and disappointing situation.
Here are some suggestions that you can try:
• If you want to remove attachments from emails in the new Outlook for Windows client, you can do so by right-clicking on the attachment and selecting Remove Attachment from the context menu. Alternatively, you can select the attachment and press the Delete key on your keyboard.
• If you want to switch back to the old Outlook for Windows client, you can do so by going to Settings > View all Outlook settings > General >New Outlook and turning off the toggle for Try the new Outlook. You can also click on the toggle button at the top right corner of the Outlook window. Note that this option may not be available to you if your admin has enforced the new Outlook for Windows client for your organization.
• If you want to provide feedback or report a problem with the new Outlook for Windows client, you can do so by going to Help > Feedback or Help >Support in the Outlook app.
You can also use the Feedback Hub app on your Windows device or visit the [Outlook for Windows feedback] page to share your thoughts and suggestions with us.
I hope this helps you with your Outlook for Windows issue.