Artem Chigvintsev Says He Likes Construction Work, Fires Back at Nikki Bella

Artem Chigvintsev says he's more than just a 'DWTS' alum, he's also a DIY guy at heart ... pushing back on some nasty things his estranged wife says about him. Here's the deal ... in a restraining order Nikki Garcia (Bella) filed against Artem last…