I read some people saying "don't use backstab if you don't like it", but the game is extremely hard/impossible if you don't backstab. This "don't do it if you don't like it" have real and huge consequences on the experience.
I disagree on this point. I am a casual player that in all games chooses the "easy" difficult option, I am no strategist, I got easily annoied by difficult battles, and I never use backstab. Once I learned the mechanics of the game and found the way to overpower my toons before the boss battles, I had no difficulties in my playthrough, but even in my first playthrough I found some difficulties in advancing but in the end I was able to end the first chapter without too much effort (obviously I had my full of missteps like adventuring in the Underdark when my party was level two, or trying to fight ordes of goblins instead of eliminate them one little group at the time or frontally engaging the owlbear mother and so on.. ..) and again I didn't use backstab.
All right but then you're using something else.
That's not really important but you get the idea : save scumming doesn't impact the experience of everyone, only those who choose to use it.
The whole idea that players can't handle a few misses is baffling to me. That's like saying fans in the NFL can't handle an incomplete pass, all most fans remember is who won and who lost. Fans will even forget fumbles and interceptions if their team wins. (Maybe it's because an incomplete pass isn't always an incomplete pass, the chance for an interception is exciting).
HP-bloat does have the benefit of ensuring combat won't take too long, so it's not just about avoid save scumming at least.
The big difference is that playing a solo video game is not a competition...
As your friends, I also restart a battle when a single character die in FE : Three houses^^