There is a lot of cringe daygame stuff on youtube, some of it is decent but there is a lot of low quality spam approaching. The difference I've noticed the most is that the guys who are good use their presence and nonverbals very well, whereas other dudes are walking around like invisible salesmen who need to be reminded that they exist - talking too much, too high energy, spamming techniques from arms length rather than responding to her and letting her draw him closer, etc.
It's the difference between a movie where an actor says very little but every eye is drawn to them, and another movie where the actor has to keep yapping and quipping, or the audience forgets they are there. In the long run the latter will wear out his welcome no matter how much he puts in, but the former will never come close to wearing out his.
Seduction needs room to find its toehold in genuine attraction, to blush before the evidence of its own potential, to give her opportunities to step forward into it, to grow steadily in the background until its effects can no longer be ignored. Otherwise it isn't seduction, it's selling. Seduction is something that makes her come to you, and requires her to do so, even when it's you who first went to her. Seduction is like walking up to a kitten with a piece of string - you might wave it first, but it's the kitten who has to roll around and grab for it, otherwise it's just you trying to sell a string.
I think the biggest problem with seduction in general - and daygame probably most specifically - is that guys don't really ask themselves what she wants from it. Not just in terms of the end goal, but what does she want at every point, what does she want to enjoy at this point and that point and the other point? They aren't creating something for her, they are just unloading their intentions in various ways into the space between the two of them. Fortunately, women are horny enough and practical enough that this sometimes works. But it's not really effective most of the time.
When you are looking at her, understanding things about her, giving her things she wants to receive in context, responding to her, watching the way she responds to you, enjoying her .. it's very hard for me to imagine this experience ever being cringe, regardless of how unpolished it is.