I'll share with y'all something I learned and way too late in life. Not everyone is going to like me. I know, sounds like a revelation but when I discovered someone didn't like me, I owned that as my problem and felt I needed to try and make them like me. What they thought about me mattered.
I also transferred that to being the funny guy. If someone wasn't laughing when I was trying to be funny, that became my objective and my wife got a kick out of it.
At some point, and I believe this happened in high school, I measured myself through others' eyes. I dated girls that were hot and didn't even like them because what other people thought of me was my driving force. If I wasn't in the in crowd and popular, I was a total failure. Even if that meant becoming something I detested, a phony.
Two things happened to me on the way to growing up, still not quite there yet. One, I took my salespeople through a training course with a good facilitator who had access to some recent sales research into the psychology of selling. This might have been simple to others but to me, this opened my eyes unlike anything I'd seen before and was life changing. This was only about 20 years ago and my wife was one of those salespeople. The research was called the Theory of 10 and simply stated that for every 10 strangers you will meet, 3 will like you right off and can't really nail down why and 3 will not like you and can't always nail down why and 4 will be undecided. The sales application of this is simple, don't spend your time on those 3 that don't like you because most can't even tell you in what way you can change to make them like you but many people will do that because it's a challenge. Spend your time on the 4 and try to convert 50% into liking you and you're magic, 50% of the prospects you will call on have a propensity to do business with you and anyone in sales will tell you that's terrific odds.
I mentioned my wife was in there and when this came up, I could feel her eyes on me and later that evening she grabbed a bottle of wine and asked me to join her on the patio. I had a feeling what was about to happen and it did. She looked me right in the eyes and began to tell me that I'd spent enough time looking at myself through the eyes of people that didn't like me and it was for their own reasons, might have nothing to do with me. Then she said "stop trying to make people laugh or like you that don't and spend time on that larger group and make them laugh more". And I began to look at myself and those around me differently than I had in my life.
This probably doesn't apply to Colo's situation with his brother but it hit a note with me and you know me, I like to share the things I learned way too late in life. The change for me was I still cared, still wanted people to like me but if they didn't, I accepted that because I knew there were other people that did. They are the ones that really matter.
Never give anyone that doesn't like you any power in your life.