I felt bad for this series so many times during its run that I just lost count, for various reasons.
I mean, look, if you have your main character declare he will put a collar on the other main character in the very first episode... at the very least make it a thing. A gag, a running joke, something that comes up multiple times during the series for a bit of fanservice. If you have a flamboyant pink guy whose self-proclaimed motto is "enjoy and excite"... leverage that for fanservice. When you're showcasing a sport with so much body contact... put some fanservice in there, it's so damn easy.
And - yes, I'm going on about fanservice, which no anime should be solely built around, but if all else fails, at least you should be able to fall back on that. And boy, does Try Knights fail everywhere, sadly even at fanservice. Story and plot are pretty much non-existent, just a very few basic building blocks of a club in disarray. A few of the characters seem to have at least some level of, well, character to them, but it's very rarely utilised. The voice acting sounds rather sterile and unmotivated all too often, which is unfortunate because the animation is outright horrid all too often as well. Soundtrack can't help either, exactly because the visual setup is so sterile. It doesn't do much to showcase rugby in any sort of exciting ways either, and that's probably its biggest crime, being a kind of official tie-in for the rugby world cup happening in Japan. With all this, the fact that even the few attempts at fanservice are so tentative (or outright bad, like I've never wanted to say no to shirtless boys before) is really unforgiveable.
There is some honest effort that can be seen, here and there, particularly in the last few episodes... But it's not enough to redeem the entire series. At any rate, why should anyone suffer through more than three quarters of a series to get to the good bits?