My perception of this is...feels like Endwalker is a no go for OP.

First of all, visual mechanics are not just an Endwalker thing, it's pretty much scattered all over the game. To be fair, I'd say visual mechs begin to ramp up with stormbloodbut yeah, they're here to stay and it just seems to me like the devs really like to make use of them to add variety to all the raids.

Fail all QTE? That's a reference to Seat of Sacrifice I believe ( I could be wrong). There hasn't been one like that since and besides, they've really, really made those things easy since then.

Usually, I'd be the person to say "keep at it, you'll get better, etc" but this is your time and money we're talking about so...maybe EW is not for you. Sorry.