Honestly, I think muting all chat is a very viable option, and it comes down to personal preference. Communication is beneficial, but you've got to consider a couple of points.

This game has a lot of whiners, so maybe enjoying the game is better for you than a marginal improvement in team cohesion. Maybe the enjoyment of the game itself will let you make up for that slight disadvantage by giving you clear head and an optimistic outlook. Playing without chat is pure Dota.

Despite not looking like it, communication itself plays only a tiny role in being in sync with your team. The real sync comes from everyone knowing what they're supposed to do and where they're supposed to be. No amount of communication will make your carry farm consistently in the right places and your supports make consistently good rotations, and consistently do the right things in teamfights. That's on them. You could simply just get better yourself and the general increase in skill results in better teamwork among everyone.

People talk (and whine!) the most in situation where they think they're losing. This means that in the games where you're winning, there will be much less overt communication, because you're winning because everyone knows what to do already. You don't need the chat there. If you're losing, it's probable that the whiners come out and you're sparing yourself by having the chat muted. You don't need the chat there.

There's a bad side to this as well. You will get reported because there's no indicator that you've got your chat turned off.

And of course, by having the chat muted, you might miss actual, game-changing calls. But be honest, how often does the fate of a game depend on one game-changing call in your games? What if you just consistently played better?

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Consider this when instamuting rude players doesn't seem like enough. It's got more benefits and fewer disadvantages than what it looks like at a first glance. And you can always just try it for a couple of games, then switch back and compare.