Well I still run Windows 10, but Office is gone. Look I was a Apple/Mac user from 1988 until 2007. But with that said I never hated Microsoft. Always had it at work. I just felt their product was inferior. Well around the time I did the reverse switch (long story) I didn't feel that was the case anymore. Sure when I set-up a new Windows machine it takes me more than a few hours. I install things like Rocketdock and Fences that gives me more of a Mac OS experience.
In fact I actually enjoy Windows 10. It at this point I note if cost wasn't a factor I'd be on a Mac. But cost is a factor. I run a "beast" of a machine and a similar Mac, well it would break the darn bank. I am blessed and could afford it if push comes to shove, but I can't justify the expense.
With that said I think Office is a wonderful set of applications and Outlook, my most used program next to Google Chrome is stellar IMHO. But since going to 365 I've had nothing but problems with Outlook. I am the nerd that friends and family call with tech problems. My brother, a Cisco engineer have joked of making tee-shirts that said "I am not your fucking tech support" we wear to family events :).
I am not used to having to call somebody for something as simple as a POP/IMAP email account.
But I have had to.
My hosting company with my domain(s) says it is Microsoft 365 causing the problem. Not their issue. I call Microsoft, which I bought 365 from, and they say it is my hosting company. At times I have to log into my hosting account and using their browser based email, a terrible kind of version of Gmail, which I find not acceptable on like ten different levels.
Even if I didn't do web development for a living, well how do any of us not need email? It is more embarrassing when I set-up hosting and emails for clients, charge them for it, and I can't seem to keep mine working correctly! It wouldn't inspire confidence for me if the shoe was on the other foot. And mine just stops working for no reason I can figure out. The number one and two problems are just bounced emails. They are going to a correct address, but get bounced back to me. A second is messages just stay in my "Outbox" and never send.
Far more than a few times I am on the phone with a client, say didn't you read my email, they say nope didn't get it. Scroll to my "Outbox" and there it is.
So running Thunderbird as an email client. This app is produced by the non-profit that makes Mozilla Firefox. At first it frustrated me, the functionality is nothing close to Outlook. I keep a ton of "Notes" on my contacts, you can do it in Thunderbird but it kind of sucks. You have to install a third party add-on for a calendar, and in Outlook I use the "Note" tab again to take meeting notes. This is possible, but not very functional.
NOTE: I am a list maker. I make lists about making a list. I've tried just about every to do list and project management software. Never happy with any of them. Either too complex or too simple. The last I found was Todolist. Web based. Desktop app. Android. Heck it works with my Google Home. They had an add-on for Outlook. Nothing for Thunderbird. Bummer.
But after a week or so using Thunderbird I've come to respect and/or like the sheer simplicity of the app. It appears programmed to do one thing and do it well, send and receive emails. I can live with that.
Moved to Open Office for word processing, presentations and spreadsheets.
I almost never use any of the Office apps outside of Outlook. But they “force” me to buy the entire Office suite even if I just want Outlook. Shame on your Microsoft. I basically just use Word to do estimates and invoices.
When I started doing HTML/CSS/PHP I found this just wonderful app called NoteTab. I write close to 24/7 on my computer but I find this app is superior, just a straight up text editor, at least with my needs, to Word which does like 10,000 things I don't need and/or want.
My electronic letterhead is pretty complex and it opened no problem, perfect in Open Office. Same for a complex PPT template I use once in a “blue moon.” And with my fire and insurance I have to use a super complex Excel spreadsheet to give Allstate info, with a ton of Macros. Worked perfectly.
I will end and/or note every app I mentioned here is 110% free. There is a paid version of Todoist and Notetab I use, but the free version would most likely do everything you need and more. If you are having any of the same problems I had with Office 365, l well this is our “out.”