It sounds like you are trying to give honest, pragmatic advice, in which case your downvotes are unfair. However, usually when people give that particular advice what they're really saying is that the bad behavior from other people is OK and that the person who feels bad because of it just needs to lighten up.
It's sort of like when someone says, "99% of humanity is too sensitive!" The ONLY people who say that are people who go around pissing off other people on a regular basis and it never occurs to them that the problem might be with their own social skills and not 99% of humanity.
So, when someone's response to someone else getting upset over jerks on the Internet is "you should get thicker skin", it's easy to jump to the conclusion that it's coming from a troll rather than someone honestly trying to help a fellow adult. Based on this comment it sounds like you meant it in good faith and were just trying to help the OP out.
It's sort of like when someone says, "99% of humanity is too sensitive!" The ONLY people who say that are people who go around pissing off other people on a regular basis and it never occurs to them that the problem might be with their own social skills and not 99% of humanity.
So, when someone's response to someone else getting upset over jerks on the Internet is "you should get thicker skin", it's easy to jump to the conclusion that it's coming from a troll rather than someone honestly trying to help a fellow adult. Based on this comment it sounds like you meant it in good faith and were just trying to help the OP out.