Learn Spanish (Spain): ¡Lo ridículo que es el presentador del concurso! - How ridiculous the host of the contest is!

While you can simply say ¡Qué ridículo! (How ridiculous!), Spanish uses the structure lo + [adjective] + que + [verb] to emphasize the degree of an adjective when attaching it to a full clause. It is the most natural way to express 'How ridiculous [someone] is!'

Does ridículo stay masculine because it follows the neuter word lo?

No, it is masculine because it describes el presentador. Even though this structure starts with the invariable word lo, the adjective still has to match the gender and number of the noun it describes. If the host were female, it would be ¡Lo ridícula que es la presentadora!

Why is the subject (el presentador del concurso) at the very end of the sentence?

In this exclamatory structure, the verb (es) naturally comes right after que, which pushes the subject to the end. Unlike English, where you say 'How ridiculous the host is!', translating that word order directly into Spanish (¡Lo ridículo que el presentador es!) sounds unnatural.

Why use es instead of está for someone being ridiculous?

Using es (from ser) implies that being ridiculous is a core part of his personality or his general style as a host. If the speaker had used está (from estar), it would mean he is just acting or looking ridiculous right now in this specific moment.