Unless you and CW's asset allocations are identical, there's no way to compare
Judging by CW's returns i'd suspect he's fairly heavy in equities. Your best bet mmight be to remind him that such a portfolio is going to have a negative year eventually- and when that happens, he's still going to pay $350 and 1.5% despite the fact that he lost money.
To which he'll likely reply, "yeah, but I would have lost more without my Guy!". Because there are some who can't comprehend investing without A (financial) Guy to hold their hand. I'm on a board at my church w/ 4 other guys, managing a fair sized foundation. At least 3 of the 4 have their personal investments with a FA. Great guys, but neither evidence of the advantages of index investing nor pointing out the head-scratching decisions of our FA will sway them. It's just not The Way We Always Did Things.
Too, some people become attached to the FA's themselves. One of the aforementioned gentlemen has mentioned having dinner w/ his Guy. A year ago, I was at the funeral of my cousin''s husband. At the luncheon afterwards a gentleman came by our table, expressed his condolences to my cousin and and he'd be in touch at some point. Someone else explained that he handled her finances and those of other family members. On the one hand, it seemed a nice touch; and I can see how it would be natural and even necessary to become familiar with a client in order to understand their financial needs. OTOH it's a shrewd move on the part of the FA; it's way harder to dismiss someone who's become like part of the family.
Conclusion: don't expend too much time in what's likely to be a losing cause. Take satisfaction in the conviction that your strategy is the correct one.