(Talking 1v1 here.)
By "inescapable combos" I mean something a bit different from what you thought: they are MEANT to be near-inescapable, however it is possible to live through it if you take defensive measures about it (Promise?

) or simply interrupt it.
A prime example is Vanquisher's Impale>Overpower>rapid skill spam. It IS intended to be this way - it is barely escapable (afaik, Impale cannot be dispelled), but you can (and should try to) survive using any of the vast defensive capabilities - either use your job's defensive skill (all classes have that kind of skills: Templars' Divine Intervention, Windwalkers' Beastial Instincts, Sorcerers' Wind Fortification, Assassins' Protection Aura, Prophet's Sanctioned Grace, etc. etc.), an absorption/healing pot or a transform (Nirenia), OR interrupt the attacker (some classes do not have means to do that, however) - Serpent Sting, Enchanted Shock, SB: Omen/Abyss, Shield Slam... w/e else that has a hard CC in it.
(Some combos, though, are literally inescapable - Wizards, anyone?)
The problem is NOT with the combos; their damage initially wasn't usually enough to instantly KO the target and left it a window of opportunity to retaliate...but now that the damage has skyrocketed, they do not even leave any chance to survive, let alone counterattack. From what I've seen, right now the situation is that those same Vanqs/Wizards/Sorcs utterly destroy their target in a very short time span; caught unprepared (which's usually the case), victims' chances are abysmal.
TL;DR - it's not the combos, it's the imba damage