First of all, the convo with @TechSkylander1518 was you saying that Pseudo legendaries (that are Pokemon with just high base stats) are somehow equivalent to Dynamax and now you being in held items? Why are you changing the topic on an unrelated post instead of actually addressing the point you brought up earlier?
Anyways, even this isn’t a fair argument since:
Tell me the name of an item which is remotely as powerful as giving a 50% HP boost and boosting the base power of Moves with beneficial effects for 3 turns while still having an additional held item.
You can hold items with Dynamax.
Again; name one ability on an extremely strong Pokemon with is remotely as powerful as a Dynamax form single handedly. Dynamax can be attached to any Pokemon on your team according to the situation; while you can’t pick or choose what Pokemon you put an ability on. You can’t use Wonder Guard on something with no weaknesses, while you can use Dynamax on a Mewtwo with +4Sp. Atk.
At this point I find it pretty dismissive of you to insult people who think Dynamax is overpowered by just saying they “can’t understand” while you yourself failed to give even a single, coherent and factually feasible or correct argument against any of the extremely well researched opinions provided by people on Smogon and on here.
-you can use semi-protected(invulnerable) moves that Max moves don't break. (1 turn from 3)
-Protects still reduce damage
-you can switch out and use immunities
-You self can Dynamax 1 pokemon during battle.
-You can still drain their hp and make their moves miss the target
-we have berries to block attacks
-we have items to revive pokemon and heal their hp during battle...
and like You said there are plenty of abilities that you can use agains Dynamax like Wonder Guard, Disquise, Sturdy, Ice Face that help in this kind of situations good.
Eiscue with Dive and Hail can handle physical Dynamax users very well.
If we get more Sturdy users added this game will change for Dynamax too.
Also we dont know maybe some of the new pokemon introduced in Crown Tundra and Isle of Armor will have abilities and moves that will reduce turns, that one turn is counted as 3 making Dynamax last one turn? or more moves that will react differently to Dynamax and with Dynamax?
We can hope they add Embargo back and make it work on Dynamax pokemon.
And that old moves that got cut come back with better effects.
Its a mechanic that boosts one pokemon from 6 in party in a full battle... Taking that Your team could have total type advantage, ability advantage and move advantage, item advantage, level advantage and boosted stats advantage there are people who worry about Dynamax only?
One pokemon getting immunities , 50% hp more and moves between 100 and 150 power for 3 turns isn't that more powerfull then megas and
Z-moves actually. Especially if You could get hit with 6 Garchomps, 6 Shedinja, 6 Mimikyus or a team mixed of them all...
Interesting Heal Block wasn't in te game, Embargo too....
If they would want to make a game change, they could make Heal Block come back in and lets say deactivate and block Dynamax or block the added 50% hp boost when used before... Or when used during Dynamax reduced it turn duration... we would need actually moves to reduce turns, making 3 or 2 turns count as one or by pass turns to make weather, perish count and other moves more usefull and strategical.
I have a weird feeling that our Wushu pokemon will clean the floor with Landorus... (Unseein fist, maybe priority punching moves???)