Without getting into spoilers, since I don't know if we're to the point we can discuss season 2 openly, but Strange New Worlds' "Tomorrow and Tomorrow and Tomorrow" fundamentally alters the backstory of a pivotal character in Trek canon. If we're supposed to squint and say all of this still happens in the same timeline, you can't because those changes are totally incompatible with the dialogue and events in TOS and Wrath of Khan. And if people still want to believe it's the same after that, then the only way you can reconcile it is to say the original version has been erased and replaced by the version that Strange New Worlds offers up.
It had already been retconned long before SNW, as noted above. By the same film which also retconned Best of Both Worlds - or does the Borg Queen appear in your copy? She's certainly not in mine.
The newer shows do contradict and change some stuff. Some visually, some in more substance. So did the older shows. It's inevitable after this many instalments. Sometimes it just suits the needs of the current show, sometimes the old stuff just doesn't make sense anyway and is better off fixed (see, for instance, women not being allowed to be captains).
What I object to is the artificial drawing of a line between eras. There were plenty of complaints about canon inconsistencies long before the modern era, just as there were complaints about quality. Then along comes the newer shows, and it's as if everything before is an amorphous blob of idealised Trek, existing for the purpose of criticising anything new. It's lazy and boring.