Good post. I get that constant negativity can be tiresome too, especially if it comes from people who do not seem to have an actual interest in the game like it is often the case here. I just don't think forced positivity is much better. And I assure you, my complaints come from a place of love. 5e is trivially my favourite edition of D&D, so I do care about it a lot.
And I am exited for some of the new stuff. For example whilst I have my reservations about some aspects of the execution, I think the bastions are a really cool thing, and I would be interested in implementing them into my campaign.
But I am worried of the game becoming less of tool box for creating your own thing and more about one fixed way of doing things. And even some people who dismissed my criticism did it via assuming that customisation would return in future publication. So whilst I don't know whether WotC pays much, or any, attention to what we talk about here, if there is an even tiny chance that people here saying that they miss the customisation would make an appearance of such publication more likely, then I think it is worth it.