I've used several IDE and I know Lazarus is a good tool but I am not going to fall into the fanaticism of saying it is the best. It has a lot of tools and good features (like the Synchro Edit that I don't find neither in Visual Studio or VSCode) but anyway I have the feeling of using an old machine in comparison when I use VS or VSCode.
I know that Lazarus is maintained by volunteers and it is difficult to achieve fast changes in a short time, but accepting the weaknesses of Lazarus will be a good starting point.
If you compare popular IDEs for various programming languages, created by volunteers (especially from scratch), Lazarus probably comes out the best. Comparing Lazarus (open source) with IntelliJ IDEA (commercial) is pointless. Behind the latter is a large group of well-paid programmers. A separate issue is that it is written in Java, so it requires a fairly powerful computer to work properly. Similar to NetBeans (which has been open source again for a long time now). This is clearly visible in the case of computers such as RPi. Lazarus works quite well on it (and I use it on RPi 3B). However, working with NetBeans on this computer is cumbersome (because of the JVM). The second of the mentioned IDEs, i.e. VSCode, is a nightmare monster made of HTML, CSS, JS (and probably some MS blobs). It works tolerably on a powerful computer. In addition, it lacks many important (for me) functionalities that Lazarus has. And even though it's free, it's developed by a corporation, not an open source community. For script kiddies, it's enough
NetBeans itself is quite a decent IDE, I've been using it for many years on my (quite powerful) personal computer (earlier, when I had a "weaker" computer, working in NetBeans was tiring). Incidentally, the decision-makers at Microchip probably had a similar opinion, because they chose this IDE as the basis for their MPLAB IDE X, while other companies chose Eclipse as the basis (e.g. STMCubeIDE, MCUXpresso-IDE, Mountain Studio). Eclipse is much more annoying and confusing to use than Visual Studio (classic, not Code). Many years ago I made several attempts at Eclipse, because I needed a more advanced editor for PHP, JS, etc. And NetBeans turned out to be much more convenient than Eclipse.
Either way. There's no point worrying about some inexperienced and naive kid (yes, some can be even 35 years old and have the mind of a teenager - a "soy latte brain"). He was trolling a bit, in his childish imagination: "he was screwing up the boomers." Like a little dog (Pražský Krysařík) who jumps at the feet of passers-by and barks loudly. And when he stomps, he runs away scared and yelps
As I see it's the real opinion of something disappointed of Lazarus IDE, and in some way, I understand his point of view.
Honestly, his statement did not contain a well-articulated point of view (no specifics), only a naive verbal taunt mixed with tearful complaining. That is why he was perceived as a troll (a rather inept one at that).