Power levels are bull, but thats not an excuse to call people like Krillin weak.

the entire point of Power Levels being bull, is that someone "weak" can be much stronger than you think, and that someone just being arbitrarily stronger makes a grave mistake by underestimating them. PL being bull is to EMPOWER the weaker party, as it means PL being the sole measurement of whether you win or lose is false and thus a weaker person can pull something off to win despite being weaker.

To say that Krillin is weak because of PL is bull, is to pretty much go against that and say that PL IS right and that its not bull at all because someone stronger will always win every time.