TTRPGS and D&D are not synonymous.
I was responding to a post that said, explicitly, D&D. Other TTRPGs are largely irrelevant, as a D&D specific conversation was being responded to. So I'm puzzled at this comment.
I know it's opinion and all, but if 5e is the best edition, that's not saying good things about D&D. Can't talk about the earlier ones, but even 3e was better put together.
Opinions are opinions, but I think this is an opinion both WotC and the majority of the player based would disagree with. Even if selecting only for players who have played multiple systems.
5e is very clean in its core design. People are free to not like it, but the design is elegant and functional. It's, at it's core, 3-8 numbers reapplied in different arrangements, depending on if you count ability scores individually or as a monolith, as you never add 2 ability scores to the same roll. You couple this with advantage and disadvantage, and the "round down" rule, you have, in essence 5e's entire math.
It is so simple, that you can reasonably balance encounters using the expected values of these number for a PC to calculate everything from AC to spell save DC of monsters. You can even take any bonuses from magic weapons, and reasonably adjust this number accurately.
Even HP is also merely a small selection of dice combinations. Essentially maxing at 4, 6, 8, 10, or 12. And again, this simplicity allows for reasonable estimations of monster HP based on player level.
I think a lot of people dislike the balance choices and power fantasy aspects of 5e and incorrectly attribute that to 5e's core design. 5e's core design is very clean from a math perspective.