People hated flash. Even non techies.
Flash was very cool, at first, then it got used for WAY too much stuff that had no graceful degradation so you were stuck waiting a few minutes for an animation to load so you could see the content stuck behind flash.
Billions of people enjoyed using Flash for games, video, music, and animated entertainment.
Do people love Javascript and HTML5, or do they like streaming entertainment?
Do gamers love Unity, or do they love playing fun games, some of which are made with Unity?
I played games on every Windows from 3.1 and up (and MS-DOS before that), but I'm not pining for the days of Windows ME despite how much fun I had on that machine.
People used Internet Explorer to run all their Flash entertainment, but nobody is arguing that IE was loved even though it was part of the flash stack for a huge majority of users.
Notably, Flash is dead, and no one is arguing that we bring it back.
If I never have to sit through a flash loading bar gating an HTML website with a completely unnecessary splash page, you won't find me mourning. (yung'uns: this was a thing. If you wanted to go see a website sometimes you had to sit for a while so a dumb flash animation would show and you could click through to the actual HTML content. Jobs did you a favour)
People loved flash for what flash was good for (creative toys) they disliked flash when certain sites started making it the core of the navigation etc.
When people are nostalgic for flash it's for finding random toys from other people who weren't "IT people".
for the younguns https://archive.org/details/joe-cartoon-frog-blender#
People hated it when apps were glitchy, when it wanted "constant" updates, or how they couldnt share a page because the entire site was some bloody flash applet.
Right up until enshittification kicks in and suddenly everyone cares and there are shouts of destroying the evil techbros who are poisoning the minds of our youth to buy a new yacht.
Can you imagine the situation if Jobs hadn't killed Flash? Most of the commercial websites required a Flash blob to deliver full functionality even back then in the early 2000's. Adobe never even vaguely pretended to be the good guys, they would have enshittified as soon as they possibly could, as hard as they possibly could (as they have done with the rest of their software). The entire web would be held to ransom at this point.
Being a binary blob is not a strong argument all by itself. chrome.exe, firefox.exe, etc. are also binary blobs. I have no love for Adobe, but that specific criticism is weak.