1& 2: These are the kinds of things that appeal to people with OCD and enthusiasts with more time than work to do. And for the former, more customization can be destructive to productivity. Most people just want to sit down and either get work done or get their game open - not sit for hours customizing the interface.
I rarely ever use my taskbar and start menu on Windows because I can hit the start key and type to find the thing I want. Linux can do that too, but you're focusing instead on finnicky customization. Most people have a cluttered desktop for a reason - nobody cares or has the time to properly organize their shit. I would suggest focusing on the real performance and productivity benefits of Linux.
3: The only people that care about telemetry are those that already hate Microsoft and already use Linux. Most Windows users couldn't give two shits that Microsoft uses their anomymized usage data to fix bugs and evaluate feature adoption. Also, the only way to avoid telemetry is if the only servers you ever access are in your basement.
4: I agree that Windows is really obnoxious about the bullshit they're putting on even base Windows install, but it takes me like 5 minutes to go through add/remove programs. You know what takes me longer than 5 minutes? Getting any non-standard hardware working on Linux, and even some software, and often because the base OS is missing something or has some box unchecked because a FOSS enthusiast has opinions.
5: Not enough people are aware of the fantastic set of freeware MS makes called PowerToys. PowerRenamer actually handles this gap for me. I feel like it should be included with windows but alas, some people would probably consider it "bloatware".
6: MS certainly has issues in this regard, but I'm curious to know how Linux Mint actually faires. Consumer-focused distros tend to benefit from their low adoption rate and don't get hammered by attacks like Windows and RHEL derivatives do. But I'll freely agree that most Linux distros tend to be more secure by default. That said, does it really matter to the average Windows user? No it doesn't. Because the biggest security issue for both Windows and Linux is actually the user - not an OS flaw. Even a default Windows environment is normally secure enough for most users.