I think this is just a case of very vocal minority.
Who reasonable is exited about Stadia anyways? I don't think it will last till next year without being slashed by google.
I wager 18 months.
As if you could create a big impact game from (or near) scratch in a year xD
Probably because they are the biggest group out there. Games are now bigger than movies, after all. The bigger the group, the more likely it is to contain a well-populated minority of viciously hateful people, a bit like "the bigger the country, the more likely it is that it will contain a sizeable group of hardcore nazis".
As a developer providing professional software, you're reasonably entitled to some respect from your customers, since your relationship is likely work related. But if you're making games, your product is eating up peoples' very valuable free time. If you mess that up for them, then you shouldn't be surprised to get a torrent of hate mail.