How to Move Out of Gmail?

Go into your Google account settings. Enable IMAPs. Use an IMAP client such as Thunderbird to download all your emails.

Create an account on a mail server elsewhere. In your Google settings, create an email forwarder to the new email address. Optionally use your IMAP client to push your Google emails up to the new email server. Optionally copy all your emails to local folders and back them up to USB SSD drives.

The new mail provider may have options to ignore the relay host in your spam rules should you wish to reduce the risk of emails forwarded from Gmail being flagged as spam. Get the Google relay host DNS names from your email headers.

Impossible. Tried multiple times, but they just won't deliver my emails and even if it's 1/10, it's too many for me.

I am staying out of G products except Gmail, but if you need your emails delivered (to Gmail addresses) I am afraid it's the only solution as of right now.

It seems like they let you download your emails and other data.

https://support.google.com/mail/answer/10016932?hl=en

Sure use outlook.com or iCloud.com with own domain. I found gmail the best for my huge storage needs of mail, and takeout makes backups so much easier (iCloud is nearly impossible, Outlook seems okay but not as smooth).