// For me it was not about the money, but a show of how much a company appreciate me and how they think of me. //
Never think this. Never assume this.
Talking to a company about salary is a business transaction. It's a negotiation. Unless you're somehow at the type of unicorn where they're not only small, but already have a lot of $$ (basically nothing out there right now) there isn't going to be any amount of "oh yeah, we like you" that will significantly impact your compensation.
// However, all of the offer were with not-that-interesting tech stacks and really bad compensations. // How 'bad' is 'bad' here if you don't mind me asking? Also, mostly startups or what?
Bad: as in mostly for rent & food, forget about savings.
Details (if it matters): Country: France Yearly salary before taxes : ~31000 euros