I remember when I first saw a PC game ever, it was WarCraft 2 - on my relatives' PC when we were visiting them. I was very young back then, and didn't even have a console (and no PC ofc). It was absolutely phenomenal to watch them play it. Probably that's why when I got my PC the first game there was Age of Empires I, that is how high my appreciation of that kind of game was, thanks to my initial impressions of WarCraft 2.
And then, ofc, my father played Diablo I. I played it only much later,
several years ago, but the memory will stay forever how I watched him play it. My first Blizzard game was Diablo II which I absolutely adored, and could think of nothing else after passing my exams at school. At that time, we avidly played HoMM 3 and Diablo II with school friends, both Singleplayer and Multiplayer.
I bought Starcraft next, and I was fully into that. Particularly due to the brand (Blizzard), yeah, considering all the previous titles I had tried were so important for me, but more because I really liked RTS games back then, and Starcraft had phenomenal music and sound design, and was sci-fi.
There came a life period where I almost stopped playing due to focusing on education/work, only playing FIFA games with friends, and that's why I missed subsequent Blizzard games. But I kept my love for Diablo over the years, and was monitoring closely any news regarding the development of Diablo III. After years of watching over the progress (I remember they had a site where put all the news and showed character concepts etc), when Diablo III was actually released (and I was back to gaming at that point), it was such a let down due to horrendous design decisions about loot, monetization etc.
Because of my withdrawal from gaming between ~2004 and 2009, I totally missed Starcraft II, World of Warcraft, and other games. Diablo III launch wasn't a pleasant experience to watch, so it cooled down my interest in the studio.
Now, years after that, I learned clearly that games are not being created by "companies", they are created by people. And these people come and go. It's very difficult to expect the same level of quality, design, actually everything, from a totally different team. And we're talking about dozens of years.
That said, the Diablo II Resurrected remaster is one of the best remasters ever created, it was amazing to see and play it. Diablo IV seemed like a cool game, I just didn't get to play it yet, and wasn't ready to pay an increased price for it at launch. The post-release situation with Diablo IV wasn't ideal either.