Right you are on Pancho's assessment - he thought Hoad was the best he faced.
Think i mostly disagree on your other comment.
Of course the back was a recurring and relapsing ailment and a factor.
However:
1958 US Pro final is considered by some one of the greatest matches in history, w both players extraordinary even by their standards. Lew lost.
1958 French Pro - beat defending champion Trabert and Gonzalez then lost to Muscles in Final.
1959 French Pro - he was feeling well enough to beat Kenny Rosewall in the 3rd place match, but lost to Sedgman in SF.
1960 Masters Pro - he went thru Olmedo, Trabert and Anderson like greased lightening, so he must have been feeling good. Lost a three set final to Rosewall.
1960 French Pro - won his first-round match, then whipped Segura and solidly beat clay master Trabert, but lost the big one to Rosewall.
1961 Wembley - beat Buchholz and Trabert in straight sets, then Gonzalez in four, and LOST the final to Rosewall.
1962 Wembley - won his first three matches but lost a very close four-set final to Rosewall.
1963 Wembley - defeated Ayala, Gimeno and Buchholz in straight sets then lost to Rosewall in final.
Point is that in these big tournaments - all but one Major - he appears to be frisky enough during the tournament, yet he cannot put it across.
Yes, the back is there, but it does not look like it is impinging too much in these key tourneys. In those RRs where he goes 0-6, 0-5, yes. But here, where he could have staked a claim w a couple of titles, he failed to put it across. Maybe his biggest problem was Rosewall and close second Gonzalez.
i think
@urban has it about right.