Lets go down the list.
1. Ukraine didn't "overthrow" Yanukovych. I've found a posted this same wiki passage for you several times. You always pop up a couple weeks later and misinform about what happened.
Parliamentary vote
On 21 February, an
agreement between president Yanukovych and the leaders of the parliamentary opposition was signed that called for early elections and the formation of an interim unity government. The following day, Yanukovych fled from the capital ahead of an impeachment vote.
The vote took place on 22 February 2014, 328 of 447 members of the Ukrainian parliament (MPs)—or about 73% of the MPs—voted to "remove Viktor Yanukovych from the post of president of Ukraine" on the grounds that he was unable to fulfill his duties
[190][18] and to hold early presidential elections on 25 May.
[18][191][19][20][21] The vote came an hour after Yanukovych said in a televised address that he would not resign. He subsequently declared himself to still be "the legitimate head of the Ukrainian state elected in a free vote by Ukrainian citizens".
[23]
The constitutionality of Yanukovych's removal from office has been questioned by constitutional experts.
[192] According to Daisy Sindelar from Radio Free Europe, the impeachment may have not followed the procedure provided by the constitution: "
t is not clear that the hasty February 22 vote upholds constitutional guidelines, which call for a review of the case by Ukraine's Constitutional Court and a three-fourths majority vote by the Verkhovna Rada -- i.e., 338 lawmakers." The vote, as analyzed by Sindelar, had ten votes less than those required by the constitutional guidelines. However, Sindelar noted in the same article that, "That discrepancy may soon become irrelevant, with parliament expected to elect a new prime minister no later than February 24." The decision to remove Yanukovich was supported by 328 deputies.https://en.wikipedia.org/wiki/Viktor_Yanukovych#cite_note-195[191][194][19][195]
Although the legislative removal by an impeachment procedure would have lacked the number of votes required by Ukraine's constitution,[193] the resolution did not follow the impeachment procedure but instead established that Yanukovych "withdrew from his duties in an unconstitutional manner" and cited "circumstances of extreme urgency",[191][194] a situation for which there was no stipulation in the then-current Ukrainian constitution.[196]
Two days later Ukraine's parliament dismissed five judges of the Constitutional Court for allegedly violating their oaths, who were then investigated for alleged malpractice.[197]
Yanukovych maintained that his replacement was a coup and continued to make statements from an official perspective.[198][199]
Disavowal by party
Yanukovych was eventually disowned by the Party of Regions. In a statement issued by Oleksandr Yefremov, parliamentary faction leader, the party and its members "strongly condemn[ed] the criminal orders that led to human victims, an empty state treasury, huge debts, shame before the eyes of the Ukrainian people and the entire world."[200][201][202]
On the same day that parliament removed Yanukovych from office, it voted to authorize the release of his rival Yulia Tymoshenko from a prison hospital.[203] She had been imprisoned since 2011, in what many saw as political payback by Yanukovych. Her release had been an unmet condition for Ukraine's signing of a European Union trade pact.[204]
Leaving Ukraine
Yanukovych left Kyiv during the night of 21 February 2014. Assisted by Russian Spetsnaz[205] he moved initially to Kharkiv with bodyguards and personal effects.[206][c] According to then governor of Kharkiv Oblast, Mykhailo Dobkin, Yanukovych had intended to make his stay in Kharkiv look like "just another presidential inspection tour" and according to Dobkin, "was desperate to make it look like he wasn't running away".[208] Yanukovych asked Dobkin to "pick out a few factories for me to visit"; the director of state-owned industrial giant Turboatom[209] declined even to take his call (according to Dobkin).[208]