The problem with a wrapper as you put it, specifically one running on Linux, is DRM. The only way I know of to achieve the desired Widevine encryption level is running the service in a tab in Chrome. Not any other browser, not even Chromium.
Of course you could just bypass all that nonsense by pirating your media, and have a nice easy interface consolidating titles from all streamers - even retaining a network badge so they can see where a given popular show is airing - like what I’ve set up in Kodi for myself as well as boomer relatives.
Other than that I’d recommend Flirc for input via remote (or LIRC if you have a supported remote already and don’t mind some extra configuration)
DaVinci resolve is on a completely different level to shotcut or kdenlive. None of them are totally intuitive, but the required learning on something like Shotcut essentially boils down to understanding that pretty much everything is a video filter, or basic track operation hotkeys (e.g S to split video segment at selected frame, X to delete selected segment).
For your use cases I’d suggest taking another look at either of those and ignoring “advanced” settings wherever possible, it’s really not that bad and you’re unlikely to find anything on either Linux or windows that is both lightweight & does all that