yeah pretty much. thought i will say that love hina is THE ecchi harem thing. it permanently shifted the genre into being forever dogshit. previous ecchi harem things (like ranma or tenchi muyo) would focus on things like jokes or having characters that you might enjoy watching in screen. love hina was what flipped the switch into harems being the exact same dreck every time, in pretty close to the form it shows up in today whether in isekai slop or pure harem

though there have been some shifts, i feel like most harem stuff nowadays avoids even the pretense of any of the girls not being madly in love with the bland self insert protagonist