Andrew Tate was never a high level Kickboxer and has never mattered to the sport. His best win was KO'ing Jamie Bates in a Full Contact fight in 2010; not even the same ruleset that the more popular form of Kickboxing uses and long before Bates grew into the fighter he is now. He spent most of his career fighting regional level talent, many of the guys either making their debut, within their first five fights, or having records with 50% win rates or less. The only way he has really affected the sport of Kickboxing is through the slow drip of his redpilled fans making their way to watching it. Fortunately MMA serves as the sponge that absorbs most of those types, but I have seen them cropping up in Kickboxing circles more and more over the years.
So no, Andrew Tate losing to some random guy is not a bad look for Kickboxing and will not indirectly make the sport look bad. If anything, there's actually been a lot of Kickboxers making the sport look great over the last 10 years or so. Israel Adesanya, Alex Pereira, Tenshin Nasukawa, Yoshiki Takei, Giga Chikadze, Cedric Doumbe, and hell I'll even throw Caleb Plant in there since he competed in the Full Contact amateur circuit a lot before going to Boxing. Rico just retired from Kickboxing and seems to be looking for opportunities in MMA and Boxing, would be really cool if we had another guy representing the sport making it look good on bigger stages.