Is Warlock a dip only class in general?

[Misterwhisper]

Warlock 1-20 is just fine. They are the dominant low level caster with most of thier utility up front.
Hence the Level dips.
Anyone else who complains is either complaining about game pacing or misguided

If the dm has to tailor the game pacing so your class does not suck, your class sucks.

The guidelines for an adventuring day is 2 shorts and a long, but many dms don’t bother. Many dms also think they make the challenge harder to limit rests, all that does is make warlock unplayable but only unconvince a monk, everyone else will be fine.

Warlock should never have been a caster class at all, but mike mearls wanted to carry it over from 4e instead of 3.5.