Last I heard Aegislash was a good Pokemon, why don't you start using it? If it's usage increases then less people will use Hawlucha. This is how a meta works.You realize that there are only 13 Pokemon in existence that resist Hawlucha's dual STABs, and we only have access to three of them? Aegislash, Rotom, and Rotom-Fan.
Half the anti Dynamax posts are acting like every Dynamax is getting attack and speed boosts like Hawlucha does. Even Hawlucha has to be facing types that are vulnerable to Fighting to get damage boosts, or flying for Speed boosts. If it's only doing neutral damage then there's a good chance it's not getting a OHKO and is being worn down in return.
If you known that your opponent is using Fightning and Flying moves, that seems like a huge advantage in team building? The reality is that either everyone isn't actually using Hawlucha or it's an immature meta and people are choosing to test Hawlucha first because of the hype.