Anurag followed bajaj and prerna to Switzerland. He bothered them throughout the trip that it became to much for prerna. Bajaj had to step in and said I can throw you out his train. However he said I won't because i won't stoop to that level. Again he wanted to do something but he knows better. He doesn't cross his limits. He let Anurag pass.
Anurag took over bajaj house. He didn't care that bajaj had family living there and at the time didn't know about kuki. He personally came for bajaj house when bajaj only came for his business. He warned Anurag and told him the reason for marrying prerna wasn't because of him. Anurag didn't listen. So how did bajaj respond he took over Anurag house. He could have done worst but didn't. Villian much? Not even the slightest.
Anurag constantly badgering bajaj how prerna is his and belong to him. How he will take her far away from bajaj because he doesn't deserve her. For two months anurag has been saying this and bajaj kept repeating the same thing to him. So if bajaj is possessive now claiming prerna to be his wife it's no different from what Anurag was doing. Claiming prerna to be his and belonging to him.
Anurag planned accident. Bajaj knew anurag was planning this accident. If he wanted he could've showed prerna this video or yet take care of anurag if he really was the so called villlian but he didn't. He decided to let Anurag have his fun and taught him a lesson. However he stopped himself from letting it get out of hand. He controlled himself. He has lines he doesn't cross. Both anurag and bajaj has blame in it. I see the writers are dividing it between anurag and bajaj.