An Analogy: TL/DR below...
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Years ago, a few buddies and I found this great little bar. It was a kind of Hole in the Wall. The place was not stylish, but the staff was excellent, the owner was there every night, and much to our surprise, they had a small kitchen with a chef that could actually cook! The place was clean, and it was not super packed like most places in the area. We sort of adopted it. It was wonderful. In our little group of motorcycle riders, we valued service and friendliness of the staff above all else. Yes, they were a little more expensive, but well worth it to us.
As time went by, we enjoyed many a night there. We invited a few other people and they liked it so much that the stuck around. For months, this was our place. We loved it. Then we went on a trip, just blasting around the countryside, camping and riding. When we returned, we went to our little bar to celebrate. It was packed. We wondered what the hell happened. We spoke to the owner that was quite excited. Seems the local paper did a small feature on this little bar that appeared the day after we left. Now the place was a madhouse. There were people wall to wall and it was super loud. We decided to give it some time to die down since everything is a novelty when its "New".
We waited a couple of weeks and went back. What we discovered was shocking. There was a whole new staff, and the owner looked ragged. After talking to him, it seems that his staff could not handle the crowds that the article brought in. The police had to be called almost every night because of the drunks fighting, there was a small mutiny in the kitchen and the Chef left as did almost all the staff. The owner scrambled to get new staff, and there was only one waitress that we recognized. It was her last night as she had given her notice. The place was still packed, but it was a group that were loud, rowdy, and rude for the most part. The owner was trying to keep up, but even though his sales were up, the turnover in staff, damages caused by the "New" crowds were causing him to loose money now.
When we first found the place, he was employing 4 servers, A Chef and a Helper, and a full time bartender. Now he had 8 servers, no chef, and 4 people in the Kitchen that had no clue. He was at his wits end and you could see it in his face. He apologized for what the place had become, and we knew he was sincere, but it just wasn't inviting any more. There were college kids fighting outside, the bathrooms were a bizarre scene of drunken people throwing up all over the place, and the bar itself was now a complete filthy mess.
After that last night, we decided that we would not be returning. He closed a few weeks later. I ran into him about a month after he closed. He looked better, but it had taken its toll on him. When we met, he was happy and looked healthy. Now he looked frail and tired. He told me that he could not keep staff, and that he lost so much money in such a short period of time, he was cutting into his life's savings to keep the place afloat. I told him I felt bad for us not returning. He looked at me and smiled. "Oh don't worry, I don't blame you or anyone else for not coming back. Even I had to leave."
TL/DR: If someone has a bad experience in a place, even after a while of having a great experience, the Bad lingers a lot longer than the good, especially when there are other options.