I think if you did some research, you would find other email client options available for free. I still use WIN 10 built-in Mail app for my personal Outlook.com email accounts. Though use the full version of Outlook client exclusively for work emails, as I get the full version of Office suite free for personal use.
I've used
Mozilla Thunderbird for 20 years with multiple GMAIL/AOL email accounts. You can also configure Thunderbird for Microsoft email accounts though prefer using it for older accounts subject to spam, or been compromised by website breaches.
Check your email account at
haveibeenpwned.com, run as a service by a Microsoft Regional Director. If have had your email accounts for a long time, don't be surprised if hackers have your email details - common these days.
You may also want to look at the free
Vivaldi browser which has a built-in Mail client. It's Chromium based such as Chrome, MS Edge, Brave, etc. and can utilize Chrome plugins. Has privacy and ad blocking features built-in, and is cross platform supported on WIN/MAC/Linux Android/iOS. I've not tried the Mail client feature yet, though will do so in the near future.