You received two, then immediately argued that they didn't really show that wizards dominated.
Did I?
One cast by polymorph (by the cleric, who got it from their domain), and the frost worm is a CR 0 bunny.
So, not even a Wizard, then?
the Wizard is one of the strongest buffers at first level, able to give out advantage once a round.
Which with a 65% hit probability increased to 88% for a single attack, really isn't that impactful. And with just 1 hp, easily removed from combat depending on the encounter. Is it a good strategy? Certainly, but again not so much a Wizard issue specifically as a spell issue (which is a perfectly valid issue and in the OP under "Spells are too powerful" point.
A hypnotic pattern has a 50% chance of incapacitating the Nalfeshnee, even with magic resistance. The challenge against a CR 13 monster with magic resistance is rendered trivial with a 3rd level spell.
I think you are overestimating things here. "Trivial", honestly? How?
I'm not sure how you are getting 50% since you aren't providing any information on your scenario. But for the sake of discussion, let's say 9th level PC with spell save DC 17. With the Wis save +6, it needs an 11, advantage bumps that to only a 25% chance of incapacitating it, not 50%. Further, the spell ends if it takes
any damage. So, again, how does this make it so its "rendered trivial"?
The usual defense against wizards not being overpowered is that their power is limited by their spell slots. As early as mid-levels, this isn't the case for days with fewer encounters. However, even in days with more encounters, the fact that many low-level spells remain extremely powerful (web, hypnotic pattern, invisibility) means that their power isn't substantially limited by their spell slots.
This leads to a question:
Is this an issue for Wizards
or all casters?
Or is it a combination of factors: the Wizard spell list, plus access to learning a lot of spells, plus too many spell slots, plus features like better ritual casting and arcane recovery?
Sorcerers are typically much less effective than wizards for a couple of reasons. First, they draw from a much smaller spell list. Second, their much fewer spells known means choosing to learn Web as their 2nd level spell means giving up many of the other extremely useful 2nd level spells.
But they are also much
more effective in other ways. I agree their spells known is pitiful, but that is an issue with Sorcerers more so than Wizards.
If you are sincere about wanting to learn about others' experiences, listen, and don't try to find reasons why it isn't really a problem that the Wizard shut down the DM's big set piece because of 1 spell.
Again, not finding a why it isn't a problem, but trying to learn more about why they feel it is a problem. It certainly might be something
I don't consider a problem, but that doesn't mean I am not sincere about trying to understand why it is to
them.
When I am trying to find the reasons for an issue, understanding how it came about is a factor. The game is designed around certain concepts, and that includes magic and Wizards. Do I agree with many of those concepts?
Certainly NOT! But then it leads to questioning is it the Wizard class, their spells, or something else that creates the perceived issue?