[FreshToku]

You basically described all the taisen movies. They're especially thin on stories and especially abundant on over-the-top action cramming in as many suits and shoehorned-in cameos as they can. My favourite of them is the Grand Prix one with Drive and Sangou, but that's not a great achievement. (It lead to the Yongou special though, which I liked a lot.) The Ex-Aid and Kyuuranger one was the last of these and I'm not sad to see them go, the budget is probably better spent elsewhere.

Also don't worry, I don't think anybody is going to lynch you for not liking Sentai! Even though these movies are hardly a good introduction to the franchise, I don't think you're too far off from how those shows work. Sentai as a whole is much more formulaic and even the most plot-focused seasons are more episodic than the average modern Rider show (I don't consider this a flaw, but it personally makes binge-watching them less appealing to me). That said, plenty of them, even the goofiest ones, have their moments of seriousness and deeper pathos.

I'm sure you'll get thrown recommendations for Sentai eventually that will just be people asking you to watch their favourite shows (I was this close to just yelling 'hey watch the one that makes up my avatar') but it's fine either way, whether you eventually find something to stick with in the franchise or if you're a Rider fan first and foremost.

I don't have much to say about the movie other than gigantic Ex-Aid is funny, and I'm glad it at least led to the Go-Rider miniseries.