It was pretty good, but many movies were that good. I picked Titanic specifically because it was broadly popular and culturally relevant.

Are you a woman? If not you can't really judge it since it was intended for women, not being the target audience doesn't mean it was bad, women absolutely loved the movie.

as someone who had a DiCaprio lookalike in his middle school when it came out, who attracted ALL the girls' attention, and also as someone whose first date ever was to see Titanic

I begrudgingly have to admit it is a very good movie