It is wrong to say it's a lesser version of Rondo of Blood, while they are meant to be the same events, they are clearly very different games. What's not wrong is to say this game sucks.
The levels are frustating, with a lot of them being to corridors with enemies on the top who CAN attack you while you cannot. The screens barely flow into one another making it feel like you just teleported places. On the topic of screens, a few of them are lifted from older Castlevania titles and end up being ust worst version of those screens.
Richter controls terrible, he feels slow and heavy, and has really short invincibility frames, making it that you could get stun locked by some enemies.
On the topic of enemies, it has the worst Dracula fight of the Castlevanias i've played, just a bore.
With all that you could wonder why i didn't score the game lower? At the end of the day is still a Castlevania game, and has its good parts, when not being an extremely frustating game i had fun with it, as some parts of it display effort and competence, it's just a shame those parts are not that many.