First of all, you did nothing wrong for voicing out your opinion because it is your rights as a consumer. So don’t feel sorry about it.
Secondly, I feel sad to your devices too which include of your mobile and the aircons. I won’t say Samsung is a bad brand because in terms of technology, they are moving way too fast and advance. To be honest their technology is way too good compared to many other brands out there.
To me the only problem from Samsung is responsibility and also communication. Reason I said responsibility is because, for some mobile devices in India (I guess many will know what I meant) Samsung India did admit the problem and willing to help their users by giving them free replacement even after warranty is out. But what about other countries like us? Or maybe Singapore? When I said communication, this I believe you already know it when you deal with their customer support team. Most of their support team (Samsung Malaysia), they are not deal it with professionally and do not take the responsibility. I am not talking about responsibility on phone issue, I am talking about their servicing during phone repair, etc. Hard for me to explain it until you deal it yourself (I believe you already got the experience yourself). Lol. Actually, you can read through other customers review in this community page. Of course, not every customer support from them is that bad, but I can say that most of them are. Lol. Is real and I tried before (through chat, shop and also servicing too).
Conclusion is, Samsung still a great brand to invest. But if they really do something on what I mentioned above, I believe they can get even more customer or at least a loyal customer who will keep using their services and devices for long term.
** Please note that my point above is not to defend or hurt any party. Just my sincere opinion only. No offense yah.
Btw, all my electronic devices like aircon, TV and even ceiling fan, I am using the brand you mentioned (P). Lol. Trust me, you will only change it after 5 years or even longer. They don’t have the ecosystem like what Samsung did, but for long term use, yes, they are better. Lol (No promotion, please)..