To be honest, the S&T isn't bad - Unless you want to modify it. The hop is annoying and only one really works with it (Begadi, so big bucks). Both of my stock S&T's do run lovely though, and the EBB is quite fun on the MG36 🤤 Most of the issues I ran into was because I was changing brand parts over and trying to make them work, which ultimately didn't.
Sadly, the best feeling one (Imho) is the Umarex/Ares G36X - However, internally it's Ares. Closely followed by the new generation S&T.
Out of the 11 G36's I've had, I would personally put them in this order from best to worst:
JG - Works great, dirt cheap and takes the most upgradeable parts just don't snap the selector plate.
Umarex/Ares (Although currently mine has an S&T stock gearbox in it) - Mainly biased because it takes the Ultima industries handguard so I can have a legit G36KA4.
S&T - I've had 4, and all of them have ran great out of the box with no issues at all.
Cyma - Surprisingly, being cyma they're not as great as I would have hoped.
Specna - Feels awful, like... really plasticy. Shot alright but I would definitely not buy another. Also really picky with what mags it will feed.
The WE GBBR is undoubtedly on the top, but that's kind of to be expected.