There are technical issues with this game as well as gameplay issues.
The main menu is killing GPUs (yes there is the console command for fps limit) but it wasn't like this before.
The cosmetics don't work as designed (a lot of great immortals items have lost their effect). I won't even bother to list them all, you have Earthshaker, you have Alchemist, you have… actually just pick any other hero and you will find that cosmetics are not what they were.
The matchmaking below 3K to 1K is crap, if you don't play party you might as well just give up.
The reset MMR doesn't work, yet we are in a new season according to Dota+.
The report system is useless, have done so many cases you those people are still freely playing this game.
The behaviour score metric is a joke and 10k is actually disappointing if you compare it to 8K.
The end game menu takes so long that you wish to wuit through console.
And lastly but not least, the gameplay is too rigid. This is debatable yes, but the mechanics are too LoL-ish.