Describing the turnout as "very, very disappointing", he added: "I think people have got election fatigue and I think also there is a slight disenfranchment with politicians generally".
"There's a common misconception that Brexit has already happened - but it hasn't happened".
Welwyn Hatfield's Conservatives have clung onto control of the borough council after a roller coaster election.
Jeremy Corbyn's party had made a significant push to take Tory "crown jewel" authorities but failed to make the strides needed.
"It's clear that the UKIP vote has gone to the Conservatives".
In Reading, Labour won 30 seats; the Conservatives won 12; the Green Party won three and the Lib Dems won one. It's very hard to put your finger on why that happens but that's the nature of marginal seats.
In the north west, the Conservatives lost their only council in Greater Manchester in a defeat Labour claimed as a "huge coup".
Conservative group leader Cllr Ian Lewis also said he was "delighted" with the night's results, as his party saw big wins in Moreton West, Clatterbridge, West Kirby and Thurstaston, and Heswall.
With 150 councils and 4,000 seats being counted, results are still trickling in for the local elections.
The result, however, has no bearing on the balance of power at Shire Hall with the Conservatives holding 36 of the council's 57 seats.
After 14 years of Tory rule at Trafford Council it went to no overall control.
Meanwhile the Liberal Democrats have made substantial gains, winning back the London borough of Richmond from the Conservatives, and experiencing a resurgence not seen since the 2010 general election.
May's party held on to control of Wandsworth council - a low-tax Conservative stronghold since the time of late prime minister Margaret Thatcher.
Most councils have declared their results overnight but others are expected to declare them later today.
Speaking to Sky News, Labour shadow chancellor John McDonnell played down suggestions his party should have been enjoying a more dominant night.
LABOUR held onto the old Warwickshire County Council seat of MP Matt Western in Thursday's by-election - by just 25 votes.
Mayoral elections were held in Hackney, Lewisham, Newham, Tower Hamlets, Watford and the Sheffield City region.
This 12 months some areas will see the primary trials of councils requiring voters to indicate ID earlier than casting their poll.