I think the evidence merely suggests that his DEA will be ineffective. His initial pick for head of the DEA, Florida sheriff Chad Chronister, went two days [0] from being announced to be being "pulled out" on account of his lack of experience with the border and his arrest of a megachurch pastor for COVID public gathering rule violation [1].
My assumption is that the GP expects that it will be gutted by the Department of Government Efficiency and/or be significantly laid off via Schedule F conversion [2]. However, rules made earlier this year by the OPM should limit that specific method of getting rid of civil servants [3].