"the temperature is much higher these days than I remember any time in the past": that has to be the worst reason I've ever heard for believing in global warming, bar none. According to NASA's graph at https://climate.nasa.gov/evide... the global temperature during your lifetime has been less than 1 degree Celsius, or less than 2 degrees Fahrenheit. Do you seriously think that you are capable of detecting that amount of warming? Your 47 year old body is way different from your 7 year old body, heck it's probably quite different from your 17 year old body. So no, your memory is a very bad way to measure temperature change of that magnitude over a period of decades. I'm not even sure you could tell a one degree C difference between yesterday and today.
"photos they take of nature dying, birds, hedgehogs just sitting there, doing nothing because clearly they are overheated by months of crazy heat": First, I can show you a lot of photos of nature dying (including birds) from before you were born. Ever hear of Rachel Carson? Second hedgehogs are not the liveliest of mammals; they pretty much sit there and chew on grass at any time. And if one was in fact doing nothing, you have no evidence whatsoever that it was due to overheating. They don't live forever, you know.
"At the ocean the water is much warmer than I am used to" Again, I say your memory is faulty. During your lifetime, the average seawater temperature at the surface has gone up by less than half that of the atmosphere. I really don't believe you can detect that.
"winters are completely different" Yeah, I suppose; when I was a kid I had to walk four miles through three feet of snow to school every day, and it was uphill both ways. Again, your memory of "winter" from when you were ten (or whatever age you're thinking of) are not any more precise than your memories of temperature back then. (And you were smaller, so the snow probably seemed deeper even if it wasn't.)
"it's happening everywhere": Did you grow up in these 15--20 countries? If not, how can you say it's different there than it was 40 years ago, if you weren't there back then?
Am I saying there is no climate change? No. But I am saying that your memories of your experience (or anyone else's memories) are in no way reliable evidence. If you tried to use that kind of evidence in court, you'd be laughed out and told to pay costs.