The only thing the Tories have ever been good at is perpetuating themselves. If you look at a history of the decisions they have taken down the years, its much more difficult to find one they have got right than one they have got wrong.
Corn Laws - wrong (They wanted to keep cheap foreign food out because of the potential loss to themselves)
Voting reforms - wrong (opposed at every turn, including the poor and women)
Home Rule in Ireland - wrong (all attempts at reform opposed needlessly until violence was the only option)
the Empire - wrong (they expanded it in useless places, and brought about needlessly racist legislation in other bits that helped to lose India)
House of Lords reform - wrong (opposed because they didn't control the House of Commons)
Appeasement - wrong (official Tory policy and ruthlessly enforced even into mid-1940)
Suez - wrong (on many levels - it was a bad idea, implemented badly, and it almost wrecked our economy)
North Sea Oil - wrong (the Norwegian Sovereign Wealth fund, set up with their oil money, has one trillion dollars in assets. With our oil money we have one point five trillion dollars of debt.)
PFI - wrong (though Blair / Brown expanded their use, it was a Tory invention)
Railway Privatization - wrong (as initially designed it made fortunes and killed dozens)
Austerity - wrong (the cuts were in places that didn't save money, the waste continues to this day)
Brexit - wrong (though in their defence its nearly a year in now and they dont actually have a policy)
The fact that Corbyn disagrees with almost every aspect of Tory policy is perhaps the biggest reason as to why people should vote for him.