They just dont know.
This is a general problem with gaming, especially games that are a series.
"Well when i played 20 years ago" and you were a massive noob that hasnt finished highschool, but now you are just a massive noob that pays taxes.
Its the same shit with WoW, comments about Classic in 2019-2020, like the rest never played Vanilla and didnt experience the actual game, when it mattered with the gazzilion bugs and fun shit, charge in water, dead! Thanks Blizzard, good patch!
The only thing i feel difference in gameplay with all 3 games is just the min/maxing.
D2 min/maxing (Although more Runewords were introduced when the game wasnt as relevant anymore which made it even more pointless) took longer, farm whatever drops of value trade for your actual shit, but for what reason? You can kill the Uber Versions with more basic gear, why would i play 100 hours more to get relevant drops to convert to runes, to get, 10% more damage on a Barb with 85 resist, like 90% reduction, that smacks the shit out of everything?
Oh ye, PvP, back then we were all noobs, compared to what they do today with the new Runewords and Rare items, but still, but yeah, after you try bit, 1 shotting 99% of everyone with your overgeared character, only to meet some Paladin thats simply better at PvP with equal gear.
D3 feeling is the same, if the top players are clearing 102-105 GR, the noobs are complaining about GR80 and set balance, i got lucky at friend boosting me to 70, got lucky with Ancient weapon from rare to-->Unique conversion for my build, and got to GR 95 in 6 hours played (Was actually rather disgusting to be honest), i am not gonna play another 100 hours to improve gems, burn gems, to put to 102-105, like fuck that.
D4 is exactly that also, i played 35 hours the first 5 days (work from home shenanigans), got Seasonal done, which means Tormented Lilith, Tormented Duriel, the seasonal rep, and it was something like Pit 90 then, quit for a week, restarted cause friend, then quit for another week, restarted a 3rd character , a Rogue cause of another friend, same shit, 30 hours played, mostly done, then played a few extra hours cause Rogue was interestingly scaling fun, Pit 126, why tryhard for 140s and 150s for perfect GA rolls and shit, fuck that, i barely even wear 12/12 items.
And it comes with knowledge of the game, i never cared in D2 back in 2002 and in 2003 with 1.10 to get a specific item, maybe the first few hours cause Topaz for MF
Then it was just Meph/Pindle runs, whatever drops, convert to currency, SoJ for pre 1.10, Ist for 1.10, especially the first 2 months of the patch.
I still remember that specific Friday, finish classes at 2pm, finish some pre-extra lessons math questions, pop Diablo 2 at 3:30pm, by 5pm i had found, 2 Tal armors, 1 Immo armor, 3 Stormshield, perfect ethereal Titans, 1 Ber rune, 1 Jah rune and a ton of other items i dont remember, 2 weeks after of basically trading Ali Baba and other MF items and Titans for Ist and Ist to stack MF and more gear, playing with scraps!
Only for Friday night/Saturday to trade everything for my Enigma/Breath of the Dying.
TLDR : Your irrelevant low knowledge/skilled gameplay 20 years ago does not represent reality.