On the tired part, the format was kinda retarded. Bracket advantage and resetting in mobas is pretty dumb, that's a fuckton of matches in a row, and while hots has shorter matches than other games, it's still long as hell especially if the matches are even. In this case it was "only" 8 games, but that's pretty ridiculous I'd say, especially without significant breaks inbetween. They should have played a bo7 with a 1game advantage, assuming they wanted an advantage at all. In general mobas don't have advantage because the advantage of being in the winner brackets is you have more time between your games and less games to play, while lose brackets is in constant direct elimination mode and plays more games which tends to be more games in a row too and end up in the finals already more tired.
Felt like a really shitty format overall.
I'm still not convinced about this game as a spectator game though, I hate how abrupt the endings are in general. Like it's 15+ minutes, one team kills 3 of the other team? Game's probably over since respawns are decently long and the core is made of plaster and cardboard. I feel this is very anticlimatic. There's also something to be said about certain maps being a lot about not engaging in teamfights and just taking a bunch of pve objectives in order so that the opponent always has to respond while being chipped down, culminating in one single teamfight that wins the game.
I mean for a game that was touted as the most action paced moba with teamfights starting at 1-2mins and shit, you often see 25mins games with less kills than a dota2 game at 25mins, and the dota2 game is just starting to enter the teamfight phase at that point. I mean there's farm fests too sometimes, but a lot of the game in dota seem to have an average of 1kill/minute with often 1.5 or 2, while hots seems to often end at less than 1 per minute(part of it is the core thing where a couple of good teamfights result in the game ending, even if not complete wipes). The unified level system is probably a part of it too since it's basically dumb to take a fight if the enemy team is one or more levels ahead and gets a talent point advantage, so there's a lot of avoiding teamfights because you mathematically can't win, which isn't nearly as pronounced in dota due to varying levels of farm and efficiency not being tied to levels or gold for a lot of the supports.