i let ping plotter run for a bit longer, this is what i ended up with
here
Still doesn't look very good, especially the average. I just ran Google.com in Ping Plotter, which is definitely not usually the best case scenario URL, and I averaged mostly under 10ms. That was also with a pretty zigzaggy ping route.
I suggest trying other local URLs. Keep in mind you don't just want them to be nearby, but also not excessively high in traffic. Like I said, the main branch of my local public library was one of the best for me.
I also don't recall you coming back with any ping results WHILE gaming, which is perhaps most important. Until we see data like that, we won't know exactly what the problem is. So definitely check on that.
Also, we don't even know where you're located. If you're worried about detailing what city, at least tell us if it's a populated city area, or rural. Otherwise we have no way of knowing if traffic could be part of the problem.
As for your display, I've read a few reviews, one from a review site claiming it has 12ms input lag, one from a gamer saying it's mediocre at best and for casual gaming, and a YouTube reviewer whom said Apex plays fine on it but PUBG was input laggy. I have a 32" Panasonic IPS panel TV, and in Game Mode, at best I get about 33ms input lag, which is common with IPS panels. Definitely MAKE SURE you're in Game Mode though, as Game Mode uses little if any video processing, otherwise it will likely be MUCH higher.
What was said about anticipation and reaction times varying a lot is also true. At 64, I've long since lost the reflexes and dexterity needed for online play, and I know first hand it's common that many online gamers are very fast, especially in the more popular games. So that definitely could be part of the problem, if not most of it. Age usually does matter, but not everyone that's young is gifted with great reflexes and dexterity. It can be honed though, just make sure to take care of your eyes, wearing blue blocker glasses can help.
The odd thing about input lag in displays, the ones that are very low in it are either very cheap (TN), or very expensive (OLED). I'm personally waiting for OLED prices to drop, It's encouraging that they are now made in 42", but many things like COVID are still keeping prices high. Eventually they'll drop under $1000, and I hope when that happens, 4K TV broadcasts will be a thing too. However what one of the local TV station techs told me about that recently doesn't sound too encouraging.