He just made a general statement that they have to up the stakes with each new movie so they will have an even stronger Villain in each future movies, which is 80%+ True.
Garlick is weaker than Wheelo who is weaker than Turles who is weaker than Slug. It isn't clear who is stronger Slug or...
There's pretty much nothing to agree with, it's terrible. I'm not even going to bother specifying what exactly because it's literally most of it and it would take forever to point everything out.
Problem with a lot of debates like this is that we base almost everything on supersaiyan multipliers and try to math this and that, but Toriyama never cared for multipliers and all of their power is narrative based. In Toriyamas mind both Goku and Gotenks in SSJ3 can be pretty much equal, but...