Go to the founders and tell them it's either you or the team lead. Remind them of all you've done for them. If they side with the team lead or ask you to work

Go to the founders and tell them it's either you or the team lead. Remind them of all you've done for them. If they side with the team lead or ask you to work your differences out, quit. Your career will be fine. Also take a vacation as soon as possible, no phones no email, no devices at all.